Applications of Remote Sensing and GIS, for Identification of Ground Water Prospecting Zones in and Around Nandalur, YSR District

摘要

Groundwater is considered the major part of the world's freshwater resources. One of the main challenges facing the sustainable development of Kadapa is the need for better management of its limited fresh water resources. The present study on integration approach on remote sensing and geographical information system to generate groundwater potential zones using various thematic layers, such as geology, geomorphology, hydrogeomorphology and other meteorological data, like rainfall. This landuse and land cover alter in turn has influence on various hydrogeomorphological processes, such as soil erosion rate, sediment deposition in rivers and dams and also stream flow pattern in a catchment. Qualitative and quantitative analysis of landuse and land cover (LU/LC) changes is necessary to assess the impacts of change in the pattern of natural vegetation on the earth's environment. Satellite images can provide useful information regarding spatial and temporal variation of landuse/land cover in an area. In this study, to delineate the groundwater potential zones in the Nandalur mandal, Kadapa district, Andhra Pradesh. Groundwater exists in the Cheyyeru river south eastern part of the Kadapa in Rayalaseema region. Hydrogeomorphological mapping of groundwater resources is one of the key tools for the controlling development of groundwater resources. In the present study area different hydrogeomorphic units, like channel bar, flood plains (FP), pedi plain moderate (PPM), pedi plain shallow (PPS), Pediment (PD), structural hill (SH) are identified. River, channel bars, flood plains are having very good groundwater potentials, pedi plain moderate have good, pedi plain shallow have moderate and the pediment. Structural hills are indicated as runoff zone so these are poor groundwater potential zones. Remotely sensed surface indicators of groundwater provide useful data where sensible standard alternatives are not available. Integrated remote sensing and GIS are widely used in groundwater mapping. Locating potential groundwater targets is becoming more convenient, cost efficient than persistent methods and efficient with the advent of a number of satellite imagery. The nature of remote sensing-based groundwater investigation is to delineate all potential features associated with localization of groundwater data.