Abstract
QUALITY OF GROUNDWATER IN CENTRAL GODAVARI DELTA, ANDHRA PRADESH
A. V. S. S. Anand*, Dr. K. HariKrishna, Prof. E. Ammineedu and Prof. B. Surya Prakasha Rao
ABSTRACT
Groundwater is one of earth?s most vital renewable and widely distributed resources as well as an important source of water supply throughout the world. The quality of water is a vital concern for mankind since it is directly linked with human welfare. Central Godavari Delta is known for its rice cultivation and the Canal irrigation. This area covers 16 mandals of East Godavari District of Andhra Pradesh. To study the chemical quality of ground water, 48 key observation wells were established and samples were collected during pre-monsoon season and post monsoon seasons and locations are identified with GPS. Water quality parameters for drinking water standards determined using standard water quality procedures and prepared spatial distribution maps in Arc GIS environment. Groundwater is a valuable natural resource that is essential for human health, socio-economic development, and functioning of ecosystems. Various chemical constituents of water occur as dissociated particles or ions. In the present area of investigation, the chemistry of groundwater with respect to the major elements and chemically related properties has been determined. The major cations include Calcium (Ca+2), Sodium (Na+), Potassium (K+), Chloride (Cl-), Sulphate (So4-2) and Nitrate (No3-). Thechemically related properties such as Total Dissolved Solids (TDS) and Total Hardness (TH) were also determined. Integrated overlay technique helped to delineate to prepare spatial distribution of groundwater quality for drinking purposes Potable and Non ? potable in the study area. The variation in electric conductivity also has a relation with the proximity to sea. Based on the recommendations of the Bureau of Indian Standards, the quality of ground water from the shallow aquifer in the area is potable except in a small pockets around Katrenikona, Uppalaguptam, Malikipuram where the Electrical conductivity is more than 3000 micro siemens/cm at 25?C.
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