%0 Journal Article
%T A Study on Moyna Basin Water-Logged Areas (India) Using Remote Sensing and GIS Methods and Their Contemporary Economic Significance
%A Abhay Sankar Sahu
%J Geography Journal
%D 2014
%I Hindawi Publishing Corporation
%R 10.1155/2014/401324
%X The prime objective of this paper is to identify and map the water-logged areas within Moyna basin, India, and to explore their contemporary economic significances. The Landsat 5 TM, ASTER data, and topographical sheets have been taken into consideration with field observations. Maps on relief, slope, canal density, embankments, a supervised classification of the study area and then NDVI, NDWI, and modified NDWI or NDMI have been prepared here. At Moyna, the piezometric surface ranges from five to ten metres below the ground level. The percentage of clay particles is high throughout the surface soil. The total rainfall is nearly 1400£¿mm and most of it happened during the monsoon period. Two well-marked depressions are observed there within the basin and the nearly central one is wide and is clearly identified from the relief map also. Problem of drainage congestion there accelerates the onset of water-logged situation. In general, water-logged areas are not suitable for humans. People once were worried about the water-logged environment due to underwater scenario of low-lying agricultural fields for a certain period, but today local people are taking this environmental condition as an opportunity for fishing activity and thus they are becoming economically benefitted as well. 1. Introduction Water-logged condition is a quasinatural manifestation of lowlands and these are important in the study of man and environment. Water-logged areas, an environmental problem [1], are observed throughout the world over China, Pakistan, Bangladesh, India, and so forth, and therefore this problem of water-logging is regarded as a global issue [2]. Within the wide range of environmental issues, it is a hydromorphological occurrence which needs spatial encounter towards economic management as well as development of an area. Normally water-logged environment encompasses flood basins with drainage problem. Water-logged environment is found in the areas where soil remains saturated with water [3]. The word ¡°water-logged¡± is used as an adjective referring to soil that is saturated with water and thus cannot keep oxygen between its particles [4]. The water-logged condition is a result of blockage of water on the land surface, especially in a low-lying area. This blocking of water is controlled by local geology, topography, drainage, and the amount of water supplied to the site [5]. It is also the result of changing landuse within the human environment. Sometimes the water-logged situation of an area is the outcome of all-round embanking with poor drainage system; Moyna basin
%U http://www.hindawi.com/journals/geography/2014/401324/