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temperature within the area of Jeneberang estuary on the tide and receding conditions. Data retrieval channeled on the realm of Jeneberang estuaries with a distance between factors m utilizing the ADCP and CTD instruments. The outcomes showed an increase in salinity at Jeneberang estuary, which was influenced by floor and river mattress. Heavy rain causes landslide and debris move, which produce sediment and woody debris in the mountain river basin. During the process, woody debris and sediment are trapped by the obstacles. As a result, woody particles accumulations at bridges are shaped. Trapped woody debris on the bridge caused inundation as a result of the obstacle blocked the water move in the river course. To get more data regarding the woody particles accumulation at a bridge, laboratory flume was used for experiments to analyze the characteristics of woody particles accumulation at a mannequin bridge with no pier. As a end result, the experiments present that the number of trapped wooden items increases with the variety of launched items. Moreover, the trapped wooden pieces brought on wooden accumulations at the model bridge and backwater rise in its upstream aspect area. Besides that, the backwater rise improve with a number of trapped wood pieces on the bridges. Excessive groundwater exploitation might lead to groundwater depletion, inflicting groundwater level at the inland decrease than sea stage and result in seawater intrusion in a coastal aquifer. To management the prevalence of SWI, an alternative resolution is to extend the replenishment of groundwater using a recharge reservoir. If a recharge reservoir is inbuilt a region with soil hydraulic conductivity under 1-5 cm/s , then a sand column is normally proposed, placed on the bottom of the recharge basin and instantly related to the aquifer layer. The function of this study is to research the effectiveness of the sand column’s application in the recharge reservoir to manage SWI. This research is an experimental study that mixes physical and numerical modeling of the recharge basin with sand columns underneath a laboratory scale. The outcomes of this research are useful for subject applications because the method that occurs in the recharge reservoir can be determined prior to the actual building within the subject. The results of the research are additionally useful to investigate whether the recharge reservoir is effective or not as a buffer of SWI in coastal aquifers.
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