Past, present, and future of global seawater intrusion research: A bibliometric analysis

Coastal zones are the transition between the land and sea. With the advancements in the technology in past few decades lead to the increase in the need for the transportation in turn leading to the...

Remote sensing and GIS application in assessment of coastal vulnerability and shoreline changes: a review

Coastal zones constantly undergo rapid changes in shape, morphology, and the environment due to natural as well as human development activities. Thus, assessing the vulnerability of the coast has b...

Assessment of potentially vulnerable zones using geospatial approach along the coast of Cuddalore district, East coast of India

Groundwater is one of the important necessary renewable resources of the world. Without water, no life can be possible on this earth. It is not only sustaining all biotic elements of the earth but also it helps to fulfill the requirement of various sectors like agriculture, industries, and other domestic purposes. Not all types of water but the mineral added purified water is safe for the human being. Unfortunately, in this age of development, it's very difficult to get naturally purified water because of the application of chemical fertilizer to get more production from agriculture, extensive industrialization pollutes groundwater resources badly. So, it’s high time to think about this most valuable resource. In this context, current research aims to identify the most polluted or vulnerable zones of groundwater in the Birbhum district. From several studies, it has been found that Birbhum district is one of the fluoride contaminated districts. Except, fluoride, another chemical component i.e. iron is also another harmful component in this district. Therefore, to assess the most vulnerable groundwater zones DRASTIC model has been applied here. DRASTIC is a widely used model for this purpose. This study deals with how the application of the DRASTIC model can help to extract the vulnerable zones of groundwater. To run the DRASTIC model various parameters viz. Depth to water level, Net recharge, Aquifer media, Soil media, Topography, Impact of the vadose zone, and Hydraulic conductivity have been used here. The final vulnerable map shows that the western part is more vulnerable than the eastern part because the western part consists of the plateau fringe area with basalt and granite and more weathering prone that’s why contamination of harmful minerals dissolve with groundwater most quickly. Moreover, the groundwater level is near to surface in the western part due to the presence of hard rocks near the surface than the eastern part. The applied DRASTIC model has been validated using the receiver operating characteristic curve (ROC) and this curve has been prepared based on some random points composed of various harmful chemical components. The result of the receiver operating characteristic curve depicts that this model is 73% valid in this concerned region.

Application of DRASTIC model for assessing groundwater vulnerability: a study on Birbhum district, West Bengal, India

New hybrid-based approach for improving the accuracy of coastal aquifer vulnerability assessment maps.

Similar to many other parts of the world, water demand has been increasing in coastal areas due to industrial development, urbanization, population growth, agriculture, and tourism. As these demands are met from groundwater, the underground aquifers show rapidly increasing trends of depletion concomitant with seawater intrusion (SWI), which in turn is becoming a major environmental issue. In this chapter, vulnerability to seawater intrusion in the Cuddalore coastal aquifer is assessed by using the GALDIT method. This ranking- and weight-driven approach, based on various aquifer characteristics of the region, helped to determine the level of salt water intrusion in each distinct hydrological setting. Results of the study have shown that the area near the coast has been highly affected by SWI. Higher SWI in industrialized and urbanized areas is observed, suggestive of anthropogenically enhanced vulnerability. About 9.97% of the study area falls into the high vulnerability region, and the very low vulnerability region comprises 22.03% of the study.

S. Sivaranjani

Papers

Assessing Coastal Aquifer to Seawater Intrusion: Application of the GALDIT Method to the Cuddalore Aquifer, India