With the increasing urbanization, agriculture, industrial activities along the coastal stretches of India, more and more people depend on ground water due to which there are cases of large scale decline in both quantity and quality. One of the State which is facing a critical change in its geomorphology and land use/land cover is Goa which is known for its tourism industry. Therefore, the water management will be a major issue in the years to come. A field survey conducted in parts of north Goa coast to understand the ground water availability status, quality issues and salinity conditions of ground water due to sea water intrusion. Accordingly, an attempt was made to understand the extent of seawater mixing with ground water using a model known as GALDIT Model. GALDIT is an indicator based model which assess and quantifies the significance of vulnerability to seawater intrusion due to excessive groundwater withdrawals. The system contains three significant parts: weights, ranges, and ratings. Each GALDIT factor has been evaluated with respect to the other to determine the relative importance of each factor. Accordingly indices were calculated for the selected wells (wells were selected along the coast and also perpendicular to the coast). Results obtained by GALDIT model showed that about 42% of the wells in the study area are low vulnerable and 58% of the wells are moderately vulnerable to sea water intrusion.

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使用 GALDIT 模型评估含水层脆弱性——案例研究

随着印度沿海地区的城市化、农业和工业活动的增加，越来越多的人依赖地下水，因此数量和质量都出现了大规模下降。在地貌和土地利用/土地覆盖方面面临重大变化的州之一是以其旅游业而闻名的果阿。因此，水管理将是未来几年的主要问题。在北果阿海岸部分地区进行的实地调查，以了解海水入侵造成的地下水可用状况、水质问题和盐度状况。因此，尝试使用称为 GALDIT 模型的模型来了解海水与地下水混合的程度。GALDIT 是一个基于指标的模型，它评估和量化由于过度抽取地下水而对海水入侵的脆弱性的重要性。该系统包含三个重要部分：权重、范围和评级。每个 GALDIT 因素都相对于其他因素进行了评估，以确定每个因素的相对重要性。因此，为选定的井计算了指数（沿着海岸选择了井，也垂直于海岸）。GALDIT模型结果表明，研究区约42%的井为低危井，58%的井为中度易受海水入侵。每个 GALDIT 因素都相对于其他因素进行了评估，以确定每个因素的相对重要性。因此，为选定的井计算了指数（沿着海岸选择了井，也垂直于海岸）。GALDIT模型结果表明，研究区约42%的井为低危井，58%的井为中度易受海水入侵。每个 GALDIT 因素都相对于其他因素进行了评估，以确定每个因素的相对重要性。因此，为选定的井计算了指数（沿着海岸选择了井，也垂直于海岸）。GALDIT模型结果表明，研究区约42%的井为低危井，58%的井为中度易受海水入侵。