N B Narasimha Prasad

Centre for Water Resources Development and Management · Groundwater Division,CWRDM

The river bed material is a potential storage reservoir of water and this sub-surface water in the river sand is extracted for irrigation and domestic water needs. There is indiscriminate, unscientific and illegal sand-mining taking place in many river courses for meeting the growing demand of the construction industry. Progressive lowering of the...

Impact of mining of river sand on the public water supply schemes along the river course.

Saltwater intrusion into shallow coastal aquifers is a major issue in Kerala coast, southwest India, like in other coastal regions. VES profiling, produce a two- or three-dimensional image of the freshsaline water interface. VES profiling was conducted to delineate the depth to fresh-saline water interface along Cherthala-Alappuzha coast, Kerala St...

Karamana river basin in Kerala, southern India, has been subjected to an integrated groundwater investigation, employing Geographical Information System (GIS). The river basin has been categorised as four zones, namely, Low, Moderate, High and Very High in terms of groundwater potential. It is estimated that about 40% of the basin comes under the v...

Perceiving the potential of springs as alternate potable water resource, the present work addressed the quantity and quality of spring water as well as possible sociocultural impacts by these springs-based water supply schemes in Wayanad, a high land district of Kerala. Top prioritization to Wayanad region due to its large mass of tribal population...

This paper discusses the ancient perennial water abstraction structures–Keni–developed by the tribal communities in Wayanad district, Kerala, southwest coast of India. Keni is shallow wooden abstraction structure built in the soil zone where the water table is near or above the ground level. These traditional water abstraction structures are perfec...

Salinity, Total hardness and coliforms are the critical water quality parameters found to be ex-ceeding the desirable and permissible limits of drinking water standards in Kiltan Island. To control further deterioration of the groundwater quality and to improve the availability of fresh water to meet the increasing drinking water demand, groundwate...

In the present study, the paleo-river channels in the midland and coastal plain region of the Periyar and Chalakudy river basins, central Kerala, west coast of India were delineated applying remote sensing techniques and electrical resistivity methods. The river basin areas are flanked by Western Ghats in the eastern side and Lakshadweep Sea in the...

The Karimpuzha watershed is situated in a typical humid tropical region in the Malappuram district of Kerala State, India. All hydrogeological information has been collected and analyzed to evaluate the groundwater development prospects in the study area. In this watershed groundwater occurs predominantly under phreatic condition. Groundwater is ex...

Resistivity traversing was carried out to characterise the fresh water-saline water interface in Vypin-Njarakkal coast, Ernakulam, Southwest of India. The area extends from Puduvypin (9 58 20 N) to Edavanakkad (10 05 08 N), has a length of 13 km. Geomorphologically this part of the coastal stretch is part of back barrier-lagoon complex, cha...

Spatial and temporal pattern of groundwater quality in shallow and deep aquifers of Keecheri-Puzhakkal river basin, central Kerala has been studied. 63 dug well and 7 bore well water samples from the basin area was collected and analyzed for the hydrochemical parameters during post-monsoon, monsoon and pre-monsoon season (2014-15). Chemical quality...

In the present study, the paleo-river channels in the midland and coastal plain region of the Periyar and Chalakudy River basins, Central Kerala, west coast of India was delineated applying remote sensing techniques and electrical resistivity methods. The river basin areas are flanked by Western Ghats in the eastern side and Lakshadweep Sea in the...

Seawater intrusion generally occurs when withdrawal of fresh groundwater from coastal aquifers results in declining groundwater levels, facilitating lateral and/or vertical migration of saline water causing deterioration of groundwater quality. Electrical resistivity sounding techniques and hydrochemical studies are widely used to determine the int...

The occurrence and movement of groundwater especially in fractured bedrock aquifers in a given area is governed by many factors viz., topography, lithology, geological structures, fracture density, aperture and connectivity, secondary porosity. The study is an attempt to delineate groundwater potential zones in deep midland aquifers along the Bhara...

The study focuses on understanding the salinity levels in groundwater and the extent of saline intrusion in sub-surface layers along Ernakulam-Alappuzha stretch applying hydro-chemical investigations and electrical resistivity sounding technique. The study area is part of the coastal plain extending from Ernakulam in the north to Alappuzha in the s...

Groundwater salinity in the coastal region extending from Ernakulam to Alappuzha of central Kerala was studied in relation to hydrogeology and geomorphology. Geomorphological mapping of the study area was carried out with the help of digital satellite data (IRS P6 LISS III, bands 1, 2, 3 and 4) acquired in February 2010. The study revealed the pres...

Seasonal salinity patterns and groundwater quality in the shallow aquifers along Ernakulam-Alappuzha coast, central Kerala was studied. Saline water intrusion is a major problem in the lowland and coastal plain region in the area, mainly due to excessive groundwater extraction. 115 dug well water samples from the area was collected during pre-monso...

Hydro-geochemical characteristics of groundwater in phreatic aquifers around Cochin area, Kerala, were studied to understand the groundwater salinity and the role of anthropogenic activities on water quality. The study area covers Cochin City and adjoining townships, receives industrial effluents from FACT, HIL, IRE, TCC, CRL, Zinc and Aluminium sm...

One of the main problems experienced by the islanders of Lakshadweep is associated with the availability of fresh water for drinking purpose. The scarcity of fresh water is due to the peculiar hydrologic, geologic, geomorphic and demographic features. Proper understanding of the groundwater condition, in terms of availability, distribution and qual...

The Rain Water Harvesting (RWH) is a recent concept, but ultimate mechanism of groundwater recharge is same as that of the traditional measures followed in the State like construction of pits, bunds, trenches, etc. But a RWH method can recharge more water of a better quality as surface pollutants will not contaminate the water, and loss through eva...

The major problem encountered by the islanders in the Lakshadweep group of Islands, India, is the limited availability of fresh water for drinking and cooking purposes. Groundwater is the only source of fresh water. The demand for groundwater is increasing every year due to growing population and urbanization. A proper understanding of the groundwa...

The study related to assessment of various chemical constituents in the groundwater, their origin and suitability for human use has been carried out in the Chaliyar river basin of Kerala (India). Groundwater samples were collected from 27 open dug wells and 7 bore wells, and analyzed. Piper tri-linear classification was followed in segregating the...

The major problem experienced by the islanders is the avalability of fresh water for drinking purpose. Groundwater is the only source of fresh water for the islanders. The demand for groundwater is increasing every year due to growing population and urbanization. Proper understanding of the groundwater condition of this island is important in order...

Evaluation of groundwater development prospects has been done with river basin as the unit. The study has been carried out in the Kadalundi Basin in Malappuram district of Kerala state, India. The pattern of water level fluctuation in different physiographic regions, the depth to water level and saturated thickness in different seasons, the hydroge...

Groundwater is the only source of fresh water for the Islanders in Lakshadweep. A proper understanding of the groundwater status is important in order to meet the increasing demand due to growing population and urbanization, and to formulate future development and management strategies. In this context, principal hydrogeologic units, water table fl...

Amini Island is one of the 10 inhabited islands in Lakshadweep. Built on the ancient volcanic formations Lakshadweep is the the tiniest Union Territory of India. The major problem experienced by the islanders is the acute scarcity of fresh drinking water. Groundwater is the only source of fresh water and the availability of the same is very restric...