Items
Tag
Hydrogeology
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Handout Himmotthan The document discusses various rock types and their mineral compositions, focusing on their grain sizes, porosity, permeability, and impacts on water quality. It categorizes rocks into several groups, including mudstone, limestone, schist, granite, and basalt, highlighting their mineral content such as quartz, feldspar, calcite, and mica. For instance, mudstone and claystone are characterized by very fine grains and high porosity but low permeability, while limestone and dolomite contain larger grains of calcite and dolomite, often resulting in higher salinity and total dissolved solids (TDS). The text emphasizes that the presence of minerals like feldspar significantly influences water quality, particularly in terms of TDS and pH levels. Generally, rocks with higher feldspar content contribute to increased salinity and TDS, whereas those with clay and mica tend to have a minimal effect on these parameters. The summary concludes with an overview of how grain size and mineral composition affect the overall hydrological dynamics within different geological formations. Understanding these characteristics is crucial for effective water resource management in various environments. -
DAILEKH SPRINGS The hydrogeological study of Dailekh Springs, conducted by ACWADAM in collaboration with ICIMOD, focused on analyzing ten springs in the region to develop conceptual models and identify groundwater recharge sites. The investigation involved detailed geological assessments and monitoring of springs, leading to the classification of springs based on geological characteristics and their recharge zones. Springs such as Bukakhali Dhara and Ganjakhanepani were part of this study, with geological data collected to inform the mapping of their respective springsheds. Key findings revealed the springs are predominantly located along a ridge underlain by phyllitic schist, with varying dip angles and fracture patterns influencing groundwater movement. The study categorized the springs into types, including depression and fracture springs, based on their formation and hydrology. Recharge measures were recommended for each spring, including staggered contour trenches and the establishment of ponds to enhance water retention and infiltration in their recharge zones. The suggested techniques are aimed at improving the sustainability of groundwater resources, considering the specific geological contexts of each spring. In conclusion, this hydrogeological analysis of Dailekh Springs provides valuable insights into groundwater dynamics in the region, emphasizing the importance of tailored recharge strategies for different spring types. By implementing these measures, the project aims to safeguard and enhance the quality and quantity of groundwater resources, contributing to the local water supply and ecosystem health. The information serves as a foundation for future water resource management efforts in the area.