Nowadays, saline water pollution has been gaining its importance as the major issue around the world, especially in the urban coastal area. Saline water pollution has major impact on human life and livelihood. It´s mainly a result from static fossil water and the dynamics of sea water intrusion.. The problem of saline water pollution caused by seawater intrusion has been increasing since the beginning of urban population. The problem of sea water intrusion in the urban coastal area must be anticipated as soon as possible especially in the urban areas developed in coastal zones,. This review article aims to; (i) analyze the distribution of saline water pollution on urban coastal area in Indonesia and (ii) analyze some methods in controlling saline water pollution, especially due to seawater intrusion in urban coastal area. The strength and weakness of each method have been compared, including (a) applying different pumping patterns, (b) artificial recharge, (c) extraction barrier, (d) injection barrier and (e) subsurface barrier. The best method has been selected considering its possible development in coastal areas of developing countries. The review is based considering the location of Semarang coastal area, Indonesia. The results have shown that artificial recharge and extraction barrier are the most suitable methods to be applied in the area. Groundwater Saline water pollution Seawater intrusion control IntroductionWater has an important role for human life and livelihood. Unfortunately water in the term of quality and quantity is getting worse over the time. The issues related to water quality and quantity have been increasing all over the world, including saline water pollution. Therefore, problems related to saline water pollution (as seawater intrusion) have become a crucial issue for the communities (Obikoya and Bennel 2010). The three major sources of fresh water are rainwater, surface water (rivers, lakes, and swamps) and groundwater. From these, the groundwater is the main contributor to our lives as source of drinking water. The usage of groundwater in human lives and other organisms on Earth is supported by its bigger availability compared to other sources. From all fresh water found on Earth (not including the ice in the polar region) 96% is groundwater (Todd and Mays 2005). Therefore, only four percent remains in reservoirs, lakes, rivers and as water vapor in the air. The abundance of groundwater represents its function as the major source of fresh water to fulfill the human population need. Unfortunately, the effect of human activities toward groundwater results in groundwater contamination, changing the chemical composition of water. Saline water pollution is one type of groundwater contamination. It´s mostly caused by human activities. In coastal areas the cases of saline water pollution are dominated by seawater intrusion. Seawater intrusion occurred in urban coastal areas is caused especially by groundwater over pumping. In Indonesia groundwater over pumping led not only to seawater intrusio...
Airtanah merupakan salah satu sumberdaya air potensial yang dapat digunakanuntuk memenuhi kebutuhan air manusia. Pemanfaatan airtanah yang berlebihan diwilayah pesisir seringkali menyebabkan terjadinya intrusi air laut. Penelitian ini bertujuanuntuk mengetahui keterdapatan airtanah asin di Pesisir Kota Cilacap. Analisis dilakukandengan pendugaan geolistrik. Analisis data dilakukan dengan menggunakan softwareIP2Win. Hasil analisis menunjukkan bahwa airtanah asin terdeteksi pada titik A, C, D danG.Kata Kunci: Airtanah Asin, Pesisir, Geolistrik, Kota Cilacap
The important issue relating to water resources is sea water intrusion (SWI) phenomena. Nowadays, the phenomena has become serious problem in the urban coastal area. Groundwater as main sources for domestic usage cannot be used again because of its salinity.Cilacap as one of urban coastal area also face the problem. In 1977 SWIwas detectedand experienced significant developmentsin 1996,This research was conducted to: (1) analyze agroundwater vulnerability to the SWI; (2) determine adistance and adepth theinterface; and (3) analyze relationship of the groundwater vulnerability to the interface depth.It was performed an analysis of the groundwater vulnerability to the SWI using the method of GALDIT, whereas the distance and depth of the interface was determined using the method of DupuitGhyben-Herzberg. The linkage analysis of the groundwater vulnerability to the depth of the actual interface was conducted by quantitative descriptively.The results showed that the distance from the shoreline was the most determined factor of the groundwater vulnerability to the SWI, the closer to the shoreline the more swallow the depth of the interface. It existed the relevance between the vulnerability level of groundwater to the SWI with the depth of actual interface. The regions with low level of vulnerability had deep interface depth, whereas the regions with moderate level of vulnerability had swallow interface depth. Nevertheless, the SWI has not yet affected the groundwater in people wells because of its depth that was not yet exceeded of 25 m.so that this depth can be used as a reference in digging wells in the research area++
The groundwater vulnerability to pollution refers to the ease of pollutants reaching groundwater, so the groundwater will be polluted. The concept shows a probability that pollution will occured which basically bases on the assumption that the physical environment can prevent the flow of pollutants into the aquifer. The purpose of this study was to predict the vulnerability of groundwater in the study area against pollution. To achieve these objectives beside base on secondary data, also measured the depth of phreatic surface, slope and groundwater sampling. Location of measurement and sampling is determinated by considering location of infiltration measurement ever done by Purnama in 2017. To conduct groundwater vulnerability analysis on pollution in the study area, carried out by SINTACS Method which bases on a numerical system of weight and rating. Weight are determined based on the significance of the effect of the parameters on groundwater pollution, while the rating is determined based on the significance of the influence of variables in each parameters against groundwater pollution. As a result, it is known that groundwater vulnerability indeks in research area range from 117,0 to 189,9. According to criteria of SINTACS, the value are classified as moderate vulnerability and rather high vulnerability. Areas that include moderate levels of vulnerability generally located in Sentolo Formations that consist of limestone and has grumusol soil type. Areas that classified as rather high vulnerability is located in Yogyakarta Formation that consist of volcanic rock and has regosol soil type. Based on this phenomena, it can be said that geological aspect and type of soil greatly affect the vulnerability of groundwater to pollution in the research area.
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