B P International

An assessment of storage changes within the Cretaceous sandstones of Lokoja Formation constituting the sedimentary part of Lokoja and its environs was carried out using USGS GSFLOW-1.0 software to investigate reasons for water problems such as drying of streams and failure of wells commonly experienced in the area. Daily meteorological data from year 2001 to 2010 and hydraulic conductivity for the area were used as input for the model simulation. Model results indicate that storage in the watershed takes place in the soil-zone, unsaturated-zone and saturated-zone and that storage takes place at different periods in the storage zones. Three storage cycles were identified in each of the storage zones. Soil-zone storage is generally higher during the second and third cycles. Storage in the unsaturated zone is lowest in the first cycle with thickness of the zone decreasing to minimum in the second cycle as storage increases to maximum. Storage increased to maximum in the second cycle of...

Saline groundwater occurs in the Karha River basin area. Groundwater is one of the major resource for the peoples of River area for domestic and agricultural purpose. The groundwater samples from study area were collected in the period of post-monsoon (POM) and pre-monsoon (PRM) seasons. The various physico-chemical parameters such as pH, Electrical conductivity, Ca 2+ , Mg 2+ , Na + , K + , total dissolved solids (TDS), total hardness (TH), HCO 3- , Cl -, and SO 4 2- were determined using standard procedures of APHA. The results of analysis were compared with the drinking water quality standards of Indian Standard Institute (BIS) and World Health Organization (WHO). For suitability of groundwater for agricultural purposes, groundwater data was compared with standard parameter of FAO. The average annual values of the electrical conductivity of groundwater ranged from 504 to 8624 μS/cm in the study period. In Karha River basin area the salinity of groundwater was considerable. 24% ...

Groundwater is considered as one of major part of the purest forms of water available in nature. Hence, to understand the use of the ground water resources and to get sustainable ground water quality the fundamental characteristics of the groundwater need to be analyzed. In the present study, GIS-based mapping of the groundwater in the central Brahmaputra Valley Zone is done with a view to observe the various quality characters. The results of this investigation could be used by decision-makers for the sustainable management of groundwater resources. The groundwater pH of the district was found to be within the desirable limit as recommended by WHO but 67.30% sample covering 79% of the total geographical area of the district was slightly alkaline in nature. Groundwater quality parameters that surpassed the desirable limit recommended by WHO, were electrical conductivity and nitrate which accounted for 41.22% and 0.79% of the total samples. Total Dissolved Solids, calcium, magnesium,...