Informatics Publishing Limited

B. K. Purandara ¹, V. P. Unnikrishnan ¹, C. Srinivas Gupta ¹, Y. L. Dora ¹

Affiliations
1 School of Marine Sciences, Cochin University of Science and Technology, Cochin 682016, IN

Abstract

In general most of the beach sediments from the area under study are medium sand-sized, unimodal, moderately sorted, nearly symmetrical and mesokurtic in terms of their grain-size distribution. The standard deviation shows minor variations from September to December. The heavy minerals commonly found in these sediments in the order of decreasing abundance are hornblende, opaques, hypersthene, garnet, mica, sillimanite, augite and diopside. The percentage of quartz in the light mineral fraction varies from 57% to 99%. The provenance of these beach sands is believed to be the rocks of the Western Ghats - charnockite and gneissic terrain.

Full Text

     

B. Venkatesh ¹, T. Chandramohan ¹, M. K. Jose ¹, B. K. Purandara ¹, S. Varadaraju ¹

Affiliations
1 Regional Centre, National Institute of Hydrology, Hanuman Nagar, Belagavi, Karnataka, IN

Abstract

In the present study, a distributed hydrological model namely soil water analysis tool (SWAT) has been employed for Manimala River Basin in Kerala, India. The entire basin has been divided into 7 major sub-basin to predict the water balance components and their variability under changing climatic conditions. The calibration of the model using the observed data indicated the model parameters such as SOL_AWC, ESCO, GW_REVAP and CN are the sensitive parameters. The estimates of water balance component at basin and sub-basin level show that irrespective of land covers, the runoff generation is as high as 47% (runoff coefficient Q/P) and groundwater recharge is 36%. The estimate of ET is comparatively low.

Keywords

Water Yield, Climate Change, GCM, SWAT, Manimala.

Full Text

   

Nagraj S. Patil ¹, Santosh Dhungana ¹, B. K. Purandara ²

Affiliations
1 Department of Water and Land Management, VTU, Belagavi, Karnataka, IN
2 National Institute of Hydrology, Hard Rock Regional Centre, Belagavi, Karnataka, IN

Abstract

In the present study, an attempt is made to simulate the current groundwater level in the Ghataprabha sub-basin (Krishna basin) in southern India. For this purpose, a single layered aquifer was conceptualized using Visual MODFLOW Flex ver.14.2. Model calibration was carried out using Parameter Estimation (PEST), with R², RMSE and NRMSE as model evaluation criteria. Model behaved well with the value of 0.99, 6 m and 2.13% for R², RMSE and NRMSE respectively. Groundwater modelling results showed that there is an increase of 1.46 m of groundwater level in 5 years. Incorporating the increasing trend of groundwater level in planning water resource projects would be fruitful.

Keywords

Groundwater, Ghataprabha, PEST, Visual MODFLOW FLEX.

Full Text