Demarcation of Groundwater Prospect Zones in Lower Reaches of Daraudi River Basin, Western Nepal

Dinesh Pathak

doi:10.32474/oajess.2019.04.000176

Abstract

Nepal is mountainous country that has 83% area covered by mountainous and hilly region while 17% area is covered by plain land of Terai.

Highlights

Nepal is mountainous country that has 83% area covered by mountainous and hilly region while 17% area is covered by plain land of Terai
Lithology is primary factor to be considered for the groundwater occurrence in an area
The study area consists of two sequence, the Lesser Himalaya sequence and Higher Himalayan sequence separated by Main Central Thrust – MCT (Figure 2a)

Summary

Introduction

Nepal is mountainous country that has 83% area covered by mountainous and hilly region while 17% area is covered by plain land of Terai. Groundwater is sufficiently available in the Terai region while the mountain aquifer is least explored in spite of its great significance for sustaining the livelihood of people. Delineating groundwater prospect zones in mountainous area is primary task for assessing the groundwater occurrence leading towards further site-specific exploration using geophysical methods followed by drilling. Remote sensing and Geographic Information System (GIS) are widely used in identification of the groundwater prospect zone and recharge areas considering geomorphology, slope, aspect, lineament density, drainage density, lithology, land use etc. Groundwater prospect mapping using remote sensing and GIS has been carried out by many authors considering various parameters [1-8]. The groundwater occurrence depends on the porosity of the media. Higher surface runoff is depicted by high relief, steep slopes and high drainage density, whereas low drainage density, high lineament density and topographical depressions are favorable for increased infiltration

Objectives

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Conclusion