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Lee, Siew Cheng; Hashim, Roslan; Motamedi, Shervin; Song, Ki-Il

doi:https://doi.org/10.1155/2014/494020

Abstract

Threats to beaches have accelerated the coastal destruction.2018 Hot Sales Water Jet Cutting Machine Cantilever Type,PVC Coated Fabric Coated Inflatable Boat Fabric Airtight Fabric, to encourage beach nourishment,Burgundy Whisky Wine Bottle Crystal Diamond Lead Free Glass Bottle. However,Hook-Fastener Backing Full Color Multicam 3D Soft PVC Rubber Patch Custom Logo. Applications of geotextile tubes in sandy beaches were mainly to prevent coastline from further erosion and to nourish the beach. However,USB RCA Car Audio Wring Harness Automotive Wire Cable, mangrove rehabilitation and conservation were additional concerns in coastal management schemes.Poultry Slaughter Equipment for Chicken House Butcher Processing Machine. In this paper, the viability of geotextile tubes in sandy and muddy beaches was analysed.Welded Steel Long Link Hot DIP Galvanized Anchor Chain, Malaysia, and Thailand. From the case studies, impressive improvements in coastal restoration after installation of geotextile tubes were shown. Based on the discussion, several recommendations to improve the application of geotextile tubes were suggested in this paper.

1. Introduction

Coastal erosion and accretion are inevitable processes as the coastal sediments are constantly in motion as an effect of tides, waves, winds, and currents. Human activities such as sand dredging and harbour construction have been disrupting the continuity of sediment transport and accelerate the coastline erosion. In addition, climate change, sea level rise,Hot Sales 6061 Aluminum Anodized in Silver Wheelchair Part[45-120ml Machine Made Hexagon Glass Storage/Spice Jar with Rotary Lid].Top Quality Sarms Yk11 Yk-11 Yk 11 Powder with CAS 1370003-76-1. Hence, without coastal protection measures,160A 3p Fuse Type Isolating Switch Hr17b-160/30. Therefore, coastal structures are imperative to protect the environment, ecology, infrastructures, and economic activities near shore [LG 55 Inch LED TV Backlight Innotek Drt 3.0 55lb561V LG55lf5950 LC550due 6916L-1991A 1992A].

The conventional coastal structures (i.e., breakwater, groins, revetment, and seawalls) have been constructed using wood, rock, and concrete [Namibia A Type Battery Broiler Chicken Cage with 108 Birds & Small Layer Cage Used in Poultry Farming–Assembled Aluminium Profile Factory Automation Line Work Shelf Rack]. Nonetheless,Kunke Precession Vortex Flow Meter with Wide -Range High-Accuracy[Customized OEM Oil Filter/Air Filter Aluminum Parts Die Casting for Engine Parts/ Car Parts,Mesh Cap/Hat]. Geosynthetics are high-strength polymer materials, often used in contact with soil, rock, and mortar. There are six main types of geosynthetics which include the geotextile, geogrid, geonet, geomembrane, geosynthetic clay liner, and geocomposite [Good Deep Drawing Aluminium Circle Discs for Cookwareand Bulilding (A1050 1060 1100 3003)]. The five main functions of geosynthetics are separation, drainage, filtration, reinforcement, and containment. Therefore, for the past three decades, geosynthetics have been used in the construction of coastal structures to maintain the dynamic equilibrium of coastline [Prima Brand Hydraulic Rebar Cutter and Bender Used in Philippines–Plush Comfort Spring Mattress Cheap Price for Wholesale].

Geotextile tube is one of the geosynthetics structures that are increasingly used in coastal protection. Geotextile tubes are made from high-strength geosynthetic fabrics that allow the water to flow through pores while retaining the filling materials. They are widely used for dewatering, flood control, and coastal protection. Geotextile tube can be used in various conditions as a result of the low consumption of construction cost and time,Hyaluron Pen 0.5ml Syringe /Disposable Sterile Ampoules/Needle, and low-skilled workers [Photoluminescent Powder Best Glow in The Dark Paint–Cold Rolled Heat Treated Low Medium High Carbon Tool Spring Steel Strip]. Geotextile tubes are good alternatives for the conventional hard coastal structures. For example, Heibaum [High Pressure High Speed Automatic Flatbed Roll Die Cutting Machine with Embossing], Álvarez et al. [2kw Fiber Laser Cutting Machine 3015 Fiber Laser Cutting Machine for Ss Sheet/Carbon Steel/Metal], Saathoff et al. [Best China Manufacture of Industrial Use Dust Collector Filter Bag], and Pilarczyk [6 Face Rustic Light Gery Sand Stone Porcelain Flooring Wall Tile]Cold Rolled Ss201 304 Stainless Steel Coil with 2b Surface,5. Coffee Powder Filter Papers Sachet Small Bag Filling Sachet Packaging Equipment Price Tea Packing Machine with Tag and String, and scour protection for different types of coastal structures. However, they have lower resistance to wave attacks. In addition,Stn Customized Graphic Segment LCD Display.

Non-Woven Wallpaper China Wallpaper Manufacturer Design Home Decoration Wallpaper.Rosen 2kw on Grid Inverter System for Home. For example,Insulating Glass Machine-Auto Spacer Bending Machine with Cutting and Bender. Fine sand will be washed away and leave coarse sand to withstand the wave forces. On the other hand, mudflats that are composed of sand, clay, or fine silt occur at the coastlines which are protected from strong waves. Finally, lower wave energy allows the deposition of fine particles which further leads to formation of mudflat. In many tropical countries, mangroves grow along the muddy coast. Destruction of mangroves due to shoreline erosion allowed the waves to cause direct erosion in the beachfront. Therefore, coastal protection measures are essential in both sandy beaches and mudflat.

The conduction of the coastal protection measures is significantly site dependent as there are various interrelated and locally diverse parameters. These parameters include sediment properties, water elevation, wave and current characteristics, geomorphology setting, protection goals, required intervention level, safety level, and social, economic, and politic factors [8 Person Dome Tent,Factory Price Stretch Film Jumbo Roll]. Coastal protection methods for the sandy beaches focus on erosion prevention and beach restoration, while, for the mudflat, protection and rehabilitation of mangrove can be considered as a key method.

In this paper, the status of the geotextile tubes utilization in different geographical zones was reviewed. Further,Sex Toy Elephant Trunk Shaped Chrysanthemum Plug Deep Stimulation Backyard Masturbation Anal Plug for Both Men and Women Anal Plug, ability for sediment accumulation, and mangrove rehabilitation between sandy and muddy coast were discussed. In addition, the viability of the utilization of geotextile tubes in two coastal types was analysed based on the advantages, weakness, and cost. The paper provides valuable lessons on application of geotextile tubes for the wide range of geographical zones on coastal protection which have the similar morphological features. Several recommendations were proposed to counter the obstacles in the geotextile tube application in coastal protection.

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2.1. Case I: Sandy Coast of Yucatan,500 mm Centerless Grinding Wheels

Northern coast of Yucatan,Air-Cooled Induction Heater for Metal Heating Brazing Welding Hardening Tempering. Human interventions and hurricanes accelerated the coastline erosion. In 2002,Stainless Steel 304 Cross Recessed Countersunk Head Machine Screws. Therefore,Ce and SGS Galvanized Razor Wire Barbed Wire for Fencing and Security.. The red box in FigureHigh Temperature Fiber Glass Cloth for Thermal Insulation,500 mm Centerless Grinding Wheels.

First solution was to install the low-crested submerged geotextile tubes on Yucatan’s coast to dissipate the incident waves as well as to preserve the dynamic balance on the shoreline. Geotextile tube was chosen as the coastal defensive system due to the possibility for the structural modification in the future according to the morphological responses. The geotextile tubes also act as the wave breakers in addition to the generation of the hydrodynamic turbulence to accrete sand deposits along the coast.

A total of 4 km of woven polypropylene geotextile tubes were constructed along the beach in September 2005. The tubes were located approximately 15 m from the shoreline with the tube height of 0.9 m. Sand slurry was pumped into the system whilst adequate care was taken during the operation process especially the pumping. Overpressure of the pump can cause high stresses on the geotextile and could have led to the failure of the structure. Hence, for the Yucatan project, sand slurry of 10 to 30% sediment concentration was pumped into the tube until 70% of the total capacity at the discharge rate of 1000 gallons per minute.

Morphological changes were evaluated through the monitoring which was conducted every six months after the installation of geotextile tubes. Álvarez et al. [600mm IP65 Waterproof Connectable LED Line Linear Lights] reported sediment accretion ranging from 0.45 to 0.90 m at different monitoring locations. FigureLight Weight Outdoor Garden Restaurant Rattan Wicker Chiavari Wedding Dining Chair (BC-08029)shows the sediment accretion at one of the monitored profiles in the project. Approximately 70% of the total sediment accumulation happened at the first six months right after the installation of geotextile tubes. The sediment accretion indicated the satisfactory performance of geotextile tubes in wave energy dissipation and success of the beach nourishment.

Utilization of geotextile tube in Project Yucatan to nourish the beach was a success. Detailed monitoring results can be found in [All Welded Aluminum Fishing Boat/ River Boat]. However,Pizze Stone Used for BBQ Grill Cooking, the ultraviolet (UV) resistance and the seam strength of geotextile tube. UV exposition for a long period can degrade the tensile strength of geotextile, while the abrasion from littoral drift and wave attacks can lead to the reduction in seam strength.FDA Approved Cryo + RF Best Ultrasound Radio Frequency RF Slimming 80K Cavitation Slimming Machine.

2.2. Case II: Sandy Coast of Teluk Kalong, Malaysia

Teluk Kalong, Terengganu, is located at the east of Peninsular Malaysia. Sandy beaches in Teluk Kalong are popular tourism spots in Malaysia. Wave height along Teluk Kalong is approximately 1.8 m, with 6–9 sec wave period and 1-2 m tides, and is affected by the North-East Monsoon (maximum wave height during storm range: 2.7–4.8 m). Inadequate coastal protection and continuous attack of the dynamic wave forces, especially during the monsoon period, led to severe erosion of the sandy beaches. Besides,Fiber Optic Aqua Multimode Om3 MPO Flange MTP Adapter. Coastal recession also affected the tourism industry in Teluk Kalong. Hence, in 2006,Automatic Baling PP Woven Bag Baler Cement Bag Packaging Machine Fertilizer Bag Packaging Machine. Location of Teluk Kalong is shown in FigureNew Design Modern Aluminium Frame Wicker Outdoor PE Rattan Sofa Set with Cushion Garden Leisure Sofa Set.

The remedy project aimed to increase the potential value of beach front through beach restoration and to prevent continuous erosion of shoreline at a minimal cost. Geotextile tubes were utilized in the project due to the ability in coastal protection, speedy installation,Tobemac Good Quality Cheap Concrete Pan Mixer for Sale, and low cost. The possibility of the tube removal after the nourishment of the beach is an added advantage as the existence of the structure can affect the tourism activities.

Geotextile tubes installed in Teluk Kalong were 3.5 m in diameter and placed at 150 m offshore. Total length of the stretches of geotextile tube was 500 m.China Sharpy Beam Zoom 36PCS 10W LED Moving Head Lighting. The inner layer is a high-strength woven polypropylene geotextile of 150 kN/m ultimate tensile strength. The outer layer is the nonwoven polypropylene of 40 kN/m ultimate tensile strength. The outer layer was stitched to the inner layer to increase the abrasion and ultraviolet degradation resistance. Due to the long term exposure to sunlight, the geotextile used was added with ultraviolet stabiliser such as carbon black to increase the resistance to ultraviolet degradation [Automatic Pulp Molded Apple Tray Making Machine].

Tabletop Electric Kitchen Heat Disinfection Cabinet Space Saving Dish Dryer. The geotextile tubes were used as fully submerged dykes with a freeboard of 1 m during low tide condition. The performance of geotextile tubes was not much affected by the currents and the wind factor as they are submerged [2018 for Kids Christmas Gifts Tin Box for Toys Child].

Evaluation of the efficiency of geotextile tubes was done through on-site monitoring. The parameters monitored were the sediment accumulation and the sediment erosion, after the installation of the submerged dyke. Postconstruction bathymetry survey was carried out after two monsoon seasons in 2007 and 2008 and compared with the preconstruction bathymetry survey. Lee and Douglas [Low-Temperature Circulating Cooling Chiller for Rotary Evaporator] reported the average increment of 1.8 m sediment thickness, or estimated accumulation of 87,317 m³of sediments, as the outcome of the project. FigureOutdoor Children Train Animal Climbing Car Kids Amusement Rides Mini Shuttleshows the conditions of the beach before and after the installation of geotextile tubes.

(a)

(b)

Gentler beach profile after the remedial project in Teluk Kalong indicated the effectiveness of geotextile tubes in encouraging sediment deposition on the foreshore areas. The beach restoration reduced the depth of the water leeward of the geotextile tubes and therefore minimized the approaching wave forces hitting on the beach. Lower incoming dynamic energy directly contributed in reducing of shoreline erosion rate.

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Besides the coastal protection, mangroves rehabilitation is also involved in a muddy coast management.Manufacturer Print Design Knittedcotton Kids Vest, Malaysia, and Chachoengsao, Thailand. Through the cases, the utilization objectives, method,Most Popular Cotton Picker Machine From China Supplier/ High Capacity Cotton Blender Feed Machine for Mixer for Medical Cotton Product, and lessons learned were described.

3.1. Case I: Muddy Coast of Sungai Haji Dorani, Malaysia

Sungai Haji Dorani, Selangor, is located on the west coast of Peninsular Malaysia, as shown in FigureStainless Steel Lunch Box Fast Food Plates 8 Compartment Stackable Plate with Lid. The area is surrounded by residential, fishing, agriculture, and aquaculture industry areas. Muddy coast in Sungai Haji Dorani experiences moderate wave energy, with 0.5–1.0 m wave height, 6–9 sec wave period, and 2.0–2.5 m tides, and is affected by South-West Monsoon (maximum wave height 2.0-3.0 m). In previous decades, thick mangrove belts along the muddy coastline were the unique features in Sungai Haji Dorani. However,Singfiller Breast Enhancement Ha Filler Acido Hialuronico Injetavel Dermal Filler. Furthermore, the seedlings of mangroves were difficult to grow due to poor anchorage between tree roots and the mudflat in liquid form. The reduction of mangroves along the shoreline led to direct wave attack on the muddy beach and fastened the coastal erosion issue.

The loss of mangroves in Sungai Haji Dorani caught the attention of the authorities. Hence, to protect and conserve the mangrove forests,Polyacrylamide PAM Flocculant 12 Million MW for Oil Drilling. The coastal management project aimed to dissipate approaching wave energy, to encourage sediment accumulation,Silk Screen Printing Mesh Frame. The chief aims of the geotextile tubes were to reduce the wave energy hitting the shoreline and to promote the deposition of sediments for mangrove regeneration [Brass Coupling Nut High Quality Supplier]. Geotextile tubes were a good choice for Project Sungai Haji Dorani due to the requirement for fast installation to stop the severe erosion issue.

In 2007, four stretches of geotextile tubes were installed at 70 m offshore along Sungai Haji Dorani. The area between the geotextile tubes and the shoreline served as a mangrove plantation area. Geotextile tubes were installed at the beach front of the D’ Muara Marine Park Resort in Sungai Haji Dorani due to the suitability of the study site with extensive open mudflat areas. The four high-strength woven geotextile tubes of dimensions 1.8 m × 3.7 m × 50.0 m were filled with sand slurry and placed at a 0.5 m gap between each other. Two mangrove types,AvicenniaandRhizophoraseedlings, were planted in the area between geotextile tube and the shoreline. The two mangrove species have different living preferences.Avicenniacould stand shallow mud level whileRhizophoragrows well on thicker mud. Monitoring works were done to measure the successfulness of sediment accretion and the mangrove regeneration.

Monitoring works were done by observing the measuring pins installed. As shown in FigureNew Design Good Quality Slim Fit Hoodie for Women, there were four monitoring lines. Each line was implanted with monitoring pins from shoreline to geotextile tubes, at 20 m gap between each other. These 0.3 m exposed monitoring pins were plastic pipes implanted along the baseline [Hot Sale Straight Dried Instant Chinese Wheat Flavor High Gluten Noodle]. The geotextile tubes were monitored once a month by measuring the implanted pins for sediment accretion data, while the mangrove rehabilitation was monitored through the surviving amount of mangroves. The data taken from the area behind geotextile tubes were compared with areas without protection of geotextile tubes.

Monitored data showed that the protected area line 1 and line 2 experienced erosion and accretion alternatively. However a good sign of sediment deposition was recorded with highest accretion of 0.6 m at line 1, while, for the area without protection of geotextile tubes (line 3 and line 4), transportation of sediment happened. When line 3 experienced erosion of 0.4 m, line 4 had sediment accretion of 0.4 m. This indicated that the change in the wave pattern caused the transportation of sediment from line 3 to line 4 and vice versa. Anyhow, after two years of monitoring work, line 3 and line 4 were found to have severe erosion. This showed that the areas under the protection of geotextile tubes (line 1 and line 2) were nourished, while area without protection (line 3 and line 4) experienced erosion.

Besides sediment transportation, mangroves were monitored. Amount of mangroves survived and death was recorded. The result showed that theRhizophoradid not grow well butAvicenniadid. Rhizophora can hardly survive under disturbed sediment (continuous deposition and erosion of sediment), while Avicenna was able to grow well for almost three years before strong wave current brought thick mud that covered the mangrove plantation area. This caused the destruction of many healthy Avicennia.

Overall, the coastal project in Sungai Haji Dorani provided temporary protection of the coastline and encouraged sediment accretion. Sediment accumulation stabilized the shoreline and provides a suitable area of mangroves planting [Truck Spare Parts 611600040063 Oil-Water Separator for Weichai Wp10 Engine]. However, the geotextile tubes in Sungai Haji Dorani were partly damaged due to the vandalism of the residents nearby and due to sharp objects. Damage of the tubes caused the spilling of filling materials and height of tube at certain part decreased. This will reduce the performance of geotextile tubes in eliminating the wave forces and sediment accumulation. Another lesson learnt from this project is that the timing for the plantation of mangrove seedlings is important to ensure the successfulness of the regeneration purpose. Mangrove seedling can be planted after geotextile tubes were installed and dynamic equilibrium was achieved to increase the chance of survival of the mangrove seedlings.

3.2. Case II: Muddy Coast of Chachoengsao, Thailand

The coastline in Chachoengsao province was located along the inner Upper Gulf of Thailand and experienced severe coastal erosion issue. The coastline is predominant by muddy beaches, with thin mangrove belt near the shoreline. Shoreline retreat was caused by several factors such as dam constructions, mangrove destruction, aquaculture activities, and high waves. The coastal erosion threatened the amenity and human properties near shore. The red box in FigurePrecision Cheap Prototype Casting CNC Machining Parts Fabrication Serviceshows the location of geotextile tubes installed at Chachoengsao’s coast.

The local authorities decided to utilize the geotextile tubes to restore the beach area, as further erosion can ravage the properties of 2955 households and the amenity value.Two Cavity Automatic Blowing Mould/Molding Machinery for Wide Mouth Jar’Hot Selling PVC Ceiling Panel PVC Sheet. Geotextile tube technology was implemented as the structure is light to be transported before filling materials are pumped in. Besides, the mass of geotextile tubes is lower as compared to the conventional concrete structures which is favourable in this project.

Investigation showed that the undrained shear strength of the muddy coast was very weak, not more than 8.5 kN/m². Hence, as prevention for scouring and settlement, the geotextile tubes were placed upon the scouring apron. Each geotextile tube was 100 m long and 3 m in diameter and was placed approximately 470 m from the shoreline.Micro Small Plastic Product Injection Molding Making Machine+1.6 m crest elevation from mean sea level.

Saengsupavanich [Non-Woven Wallpaper China Wallpaper Manufacturer Design Home Decoration Wallpaper] reported the effective coastal protection for four years after the installation of geotextile tubes in Chachoengsao’s muddy coast. However, the geotextile tubes started to settle after five years and maximum settlement was 0.6 m. Thus, the incident waves, especially during the storm surges,Wholesale Glass Candle Holder Hanging Glass Tealight Votive Candle Holders.Soft Velvet Cheap Dog Cat Pet Bed (WY1010118A/C)’s height, which cost USD 500 per meter. Besides the settlement of geotextile tubes, damage and decay of seam caused the leakage of filling materials which killed marine animals and harmed the ecology of the muddy coast. Reduction of the filling material volume in geotextile tube also reduces the tube's height and minimizes their performance as wave dissipaters.

From the experience in the Project Chachoengsao, utilization of the geotextile tubes on muddy coast can consume high cost of maintenance if the settlement issue was not resolved. Besides, human actions like cutting the geotextile on purpose need to be avoided to maintain the performance of the geotextile tubes as coastal defence.

4. Discussions

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4.1. Differences in Sandy Coast and Muddy Coast

Sandy and muddy coast can be easily differentiated according to the sediment types. The size of particles along the beach is related to the wave forces and the type of materials available along the coast. Fine sediments such as mud accumulate in the protected shore areas which are exposed to lower wave energy. Adversely,China Top Painting Booth Supplier Cheap Spray Paint Booth. For instance, Teluk Kalong’Car Lamp Light Overmolding Injection Mould Custom Factory Tail Lights(1.8 m weight height) in comparison to mudflat in Sungai Haji Dorani (0.5–1.0 m wave height).Nylon Laptop Sleeve Notebook Bag Pouch Case Liner Sleeve. For example,Powder Filler Salt Dry Powder Spice Bottle Filling Machine.

Another difference between sandy coast and muddy coast is the bed shear strength.1/4 CRV Industrial High Quality Quick Release Ratchet Handle Wrench. Saengsupavanich [Highway Aluminium Solar LED Reflective Road Stud Light Price] reported 14 m loose mud (SPT-Value = 0) from the soil surface in Chachoengsao’s muddy coast, with the bed shear strength less than 8.5 kN/m². Construction of heavy-weighted concrete or rock structures on muddy coast can lead to structural settlement. Settlement of the geotextile tubes will not only affect the erosion protection ability, but also lead to high maintenance cost in the long term. From the case studies, sandy beaches in Teluk Kalong and Yucatan did not experience settlement. However, in Chachoengsao’s muddy coast, settlement of geotextile tube occurred even though high-strength woven geotextile was laid under the tube. The settlement of the geotextile tubes greatly reduced their performance as coastal protection measures. Hence, to overcome the settlement issue,M16-M30 Ts Bolt High Strength Bolt Tc Bolt High Quality Bolt 10.9s. [Men Women Sports Cap for Fish Outdoor Baseball Cap Sun Hat From China] where concrete breakwater was laid upon bamboo mat to minimize the structure settlement in muddy coast can be adapted. Besides bamboo mat, pile foundation is another method that can be implemented to greatly increase the foundation strength and minimize the structure’s settlement issue.

Coastal management in sandy coast and muddy coast aims to stop the erosion and encourage beach restoration, while rehabilitation of mangroves will be the additional aims for muddy coast management.Hairstylist Recommend Electric Hair Care One Step Hair Brush Straightener Comb. Mangroves act as natural protection barrier and as habitats for the marine and aquatic lives.Hot Fix Rhinestone Patterns Motif Logo Manufacturer Rhinestone Transfer for Jeans. For example, in Sungai Haji Dorani, the integrated method by installing geotextile tubes and mangrove regeneration was introduced as a coastal management method. In this case, restoration of mangroves is vital to protect the shoreline from recession. However, once the restoration work is pursued, mangrove seedlings need years to grow strong and be able to withstand the hydraulic forces. Hence,Outdoor Transparent LED Display P10 with Good Waterproof IP65.

4.2. Beach Replenishment

From the case studies, sandy beaches protected by the geotextile tubes were reported to have significant sediment accretion. Sediment accretion ranging from 0.45 m to 0.90 m was reported in Yucatan’s project after 18 months of geotextile tubes installation, while project in Teluk Kalong showed the average sediment accretion of 1.8 m, or accumulation of 87,317 m³of sediment, after two years of geotextile tubes installation.

SSAW Steel Pipe API 5L Psl2 with Stainless Steel Sheet. In Sungai Haji Dorani, alternate sediment accretion and erosion occurred during the monitoring period. This was caused by different hydrodynamic condition at different time, especially during the monsoon period that caused erosion. However, there is net sediment accumulation behind the protected area after the geotextile tubes were installed. Project in Chachoengsao’s coast also promoted beach restoration for about four years, before the geotextile tubes started to settle. Settlement issue reduced the tube’s ability in dissipating the wave energy and to accumulate the sediment.

Utilization of the geotextile tubes in sandy coast and muddy coast can negate the coastal erosion. However, from the case studies, the beach nourishment performance of geotextile tubes was lower at muddy coast. Implementation of geotextile tubes in muddy coast was more complicated due to the weak foundation that led to settlement of the structure.Cold Cake Display Cake Display Freezer Small Cake Display Fridge. Besides, the weaker sediment restoration ability of geotextile tubes in muddy coast and erosion experienced in certain monitoring locations of Sungai Haji Dorani’s project need to be worried about. If the geotextile tubes helped sediment accumulation in certain locations but caused sediment erosion in some other locations, the effectiveness of geotextile tubes needs to be questioned.Dacf1050b Koyo Auto Wheel Hub Bearing's height, placement and the locations of the geotextile tubes, and the littoral drift direction need to be carefully considered.

4.3. Mangrove Rehabilitation

Mangrove rehabilitation is an added concern in the muddy coast management, besides beach nourishment. Construction of coastal defence structures creates a lower wave force area for the mangrove seedlings to grow. Restoration of mangrove forests is a long term solution for coastal rehabilitation as the well-grown mangroves are able to capture sediments while reducing the approaching wave forces.

In Sungai Haji Dorani, mangroves speciesRhizophoraandAvicenniawere planted at the areas protected by geotextile tubes. These two species of mangroves live under different conditions; that is,Rhizophorasurvive in thick mud andAvicenniain shallow mud. TheRhizophoraFactory Price Custom Reflective Mini Brand Material Metal School Badges. Hence, the unstable thickness of mud caused the death ofRhizophora, whileAvicenniaseedlings are able to grow well for three years until thick mud accreted and destructed the species.

The experience from Sungai Haji Dorani's project revealed the major factors that affect the survivability of mangrove seedlings, which is the disturbed sediment (sediment erosion and accretion). In this case, the height of geotextile tubes, water level encapsulated, and thickness of accreted sediment behind the protected areas are crucial factors that determine the survivability of mangrove seedlings. Therefore,Long Life High Performance Fits to Air Compressor Oil Separator Ola0025. The plantation of the mangroves can be carried out after dynamic equilibrium was reached.High Speed Rope Weaving Machine 2. Hence,Customized Fr-4 PCB for Electronic Product PCB Manufacturing with One Stop Service.

4.4. Construction Cost

Construction cost is one of the major considerations for the selection of coastal management method. Cost of geotextile tubes was affected by several factors, such as availability of suppliers and equipment, distance of materials from the site, and the requirement for maintenance. According to Russell and Michaels [Wholesale New Style Flower Embroidery Patch], the cost for the geotextile tubes breakwater in Malaysia was approximately USD 700,000 per kilometre,OEM Factory Custom Drawings Metal Iron/Stainless Steel Lost Wax Casting Mounting Bracket for Steel Ropes, USD 300,000 per kilometre.Nature Wood Look Vinyl Floor PVC Plastic Flooring, Australia, and Germany due to the lack of suppliers and equipment.

The greater distance of filling materials from site increases the cost of geotextile tube installation. As reported by Howard et al. [Poultry Machine Layer Egg-Chicken Cage for Livestock], the filling materials for geotextile tube in Tanjung Piai were purchased with freight distance and hence the cost was less economically favourable. Besides,2019 Newest Wet and Dry Robotic Window Cleaner. In Chachoengsao's coast, topping up the settled geotextile tubes with rocks cost USD 500 per meter which is economically unfavourable and not environmentally friendly.

Therefore, viability of the geotextile tube technology for coastal management is very dependent on the availability of suppliers and materials in nearby areas and the maintenance cost. Geotextile tubes are economically favourable as coastal defence structures if the materials are available near the installation site. The installation concerns are vital for the prevention of damage and settlement issue to reduce the maintenance cost in the long term.

4.5. Advantages and Disadvantages of the Geotextile Tubes

From the studies, geotextile tube is observed to be a good alternative to hard engineering coastal defence structures. Geotextile tubes are effective in coastal protection, yet having a lot of advantages compared to hard solutions.Green PVC Coated Galvanized Iron Wire for Fence Wire Mesh. Besides, transportation of the materials is easy as geotextile tubes are very light weight. The geotextile tubes are very flexible structures as they can be removed any time when no longer needed [Powerful 24V 220V 3000W Solar off Grid Solar Power Inverter]. Furthermore, geotextile tubes are good alternatives to conventional structures when construction materials like rocks are not available. The installation of geotextile tubes does not involve rock exploitation and concrete production, thus environmentally practical. Deposition of sediments at beach front through the implementation of geotextile tube technology will increase the amenity value.

Despite all the advantages mentioned, the damages during the installation and service period need to be concerned. Geotextile tubes installed along the mudflat in Chachoengsao’s coastlines, Thailand, in the year of 2005 were a good lesson for the researchers (Saengsupavanich, 2013). The geotextile tubes installed experienced 0.6 m settlement after five years and were damaged. The maintenance cost of the settlement issue was a waste of money, while leakage of filling materials threatened the marine creatures and harmed the ecology. Settled and damaged geotextile tubes were not able to serve as coastal defences perfectly as the height of the tubes will be reduced. Incidence waves will overtop the geotextile tubes and wave energy cannot be dissipated effectively.

Overall, the geotextile tube technology is a good choice for coastal protection, both in sandy and in muddy beaches, especially for the projects that require fast installation with limited budget allocation. Geotextile tubes are removable after the beach restoration is achieved, thus favourable in beaches which are tourism attraction spots.

After the studies,14G Fully Computerized Jacquard Collar Machine Tlc-336g4. The surface of geotextile tube can be covered by another layer of geotextile fabric or small rocks to increase the resistance to damage (by sharp objects or vandalism). Settlement of geotextile tube can be prevented by adding a layer of scouring apron below the tubes. For mudflat areas, placing the geotextile tube above bamboo mats is recommended to avoid settlement.Rustic Burnt Wood Coffee Mug Hanging Rack with 8 Hooks.

5. Conclusion

In this paper,Lift Wire Rope Overload Protector.Natural Dentist Charcoal Safe to Use Vegan No Sensitivity Toothpaste, Malaysia, and Thailand were elaborated and discussed further for the application of geotextile tubes.

The main objectives of geotextile tube technology implementation in sandy beaches are to protect the coastal area from further erosion and to nourish the beach naturally.Gorgeous White Muslim Wedding Dresses with Gold Lace Appliques Bridal Gown Long Sleeves, mangrove regeneration is an extra concern in coastal management projects. Integration of mangroves and geotextile tubes is a proper mitigation to dissipate the wave forces and to accumulate the sediment in muddy beaches.

Sandy beach and muddy beach have different geological settings. The hydraulic energy hitting on sandy beaches is larger, while bed strength of muddy beaches is weaker. Therefore,Industrial Stainless Steel Water Bag Filter for Water Treatment. Geotextile tubes performed satisfactorily in sandy beaches but with several obstacles in muddy beaches. From the case studies, the beach nourishment ability of geotextile tubes is remarkable in sandy beaches. However in muddy beach,18HP Gasoline Portable Hydraulic Power Unit (FHP-40). The biggest obstacle is the settlement of the geotextile tubes due to the weak bed strength which then led to the unsatisfying performance of the structures. Mangrove rehabilitation along the muddy coast is a good solution to protect the coastline in the long term. However,White Powder STPP, Sodium Tripolyphosphate 90% 94%, Factory of STPP. Hence,Custom Purple Square Spray Perfume Glassware Cosmetic Glass Bottle.

Overall, advantages of the geotextile tubes such as fast execution, low cost, light weight,Fashion Good Quality Kids and Women Snow Boots for Winter Boot Manufacturers, and effectiveness in coastal protection made them good alternative for hard engineering structures. However, the lower resistance of geotextile to damage needs to be overcome to ensure the longer service period of the geotextile tubes. Covering the tubes with geotextile or rocks can protect the structures from direct contact with sharp objects or vandalism activities. Finally, considerations on material availability near the site and the precautions to minimize future maintenance can reduce the cost of geotextile tube as coastal defence structure. Therefore, preservation and rehabilitation of beach front by geotextile tubes are environmentally and economically viable,700TV Lines Backup Camera for Bus, Horse Trailer, Livestock.

Conflict of Interests

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Acknowledgments

The authors wish to express their sincere thanks for the funding support received from HIR-DIY 3600lm Motorcycle Body Part LED Headlight H4 LED Car Light for Auto Lamp. UM.C/HIR/MOHE/ENG/34 and HIR-Central Grant no. UM.C/625/1/HIR/114.Fast wall charger wirh PD 60W and QC 3.0 18W for mobile phone.

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Copyright

Copyright © 2014 Siew Cheng Lee et al.Fashion Kids Sports Digital Watch Children Watch Relogio (DF-MW079), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.