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Land and water resources management of Badri Gad Watershed, Uttarakhand

KrishiKosh

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Title Land and water resources management of Badri Gad Watershed, Uttarakhand
 
Creator Srivastava, Rajesh Kumar
 
Contributor Sharma, H.C.
 
Subject land resources, water resources, resource management, watersheds, Uttarakhand, irrigation, irrigation, morphometrics
 
Description Thesis-PhD
Soil and water are the most vital natural resources for agriculture. Agricultural productivity depends on efficient use of these resources through their conservation and management. Watershed management has assumed urgency for planned development of land and water resources and to arrest land degradation process to preserve environment and ecological balance. It is not possible to start soil and water conservation work in whole watershed at a time due to lack of time, money and manpower. Therefore, it is important to first identify the critical areas to start the work within the watershed. Hence keeping this in view present study was conducted to prioritization of mini watersheds on the basis of morphometric parameters and SCS-CN method in the un-gauged Badri Gad watershed. Different thematic maps of study area were prepared using survey of India toposheet and GIS. Morphometric analysis was done using GIS tool. Curve number analysis was carried out using remote sensing and GIS software “Geomatica v. 10.0”. Maximum area was found in slope ranges from 15 to 50 per cent. It was observed that majority of the area of the watershed was covered with forest followed by agricultural land and barren land. The Badri Gad watershed was divided into eight mini watersheds on the basis of contour map and drainage pattern of the area namely: Khairari, Mason, Soutialgaon, Ghorakhuri-1, Ghorakhuri-2, Dharana, Kot and Khasosi. Morphometric analysis was done and compound parameter values were estimated. Prioritization rating of eight mini watersheds of Badri Gad watershed was carried out. The mini watershed, with the lowest compounded parameter, is given highest priority. Curve numbers were estimated for each land use and weighted curve number for each mini watershed was calculated. As the curve number has direct relationship with runoff, higher the curve number, greater will be runoff and thus higher will be the erosion. Annual runoff was calculated for 24 years’ period (1985 to 2008). It was observed that runoff varied from 2.03 to 27.30 per cent for the years 2001 and 1998, respectively. The average annual runoff was found to be 187.60 mm. It was found that mini watershed Ghorakhuri-1 was found under top priority by both the methods. Moreover mini watersheds Soutialgaon, Ghorakhuri-2, Mason, Dharana and Kot were having common priority, that is 2, 4, 5, 6 and 8 respectively, as per morphometric analysis as well as curve number analysis. It is clear that out of 8 mini watersheds 6 were having common priority rating by both the method i.e. curve number as well as morphometric analysis. From the results it was concluded that morphometric analysis is the effective and efficient method for prioritization of watersheds where availability of input data is poor. Rainfall analysis was done. It was found that 70-80 percent rain received during June to September. Drought analysis showed that maximum probability of occurrence of drought was found during rabi season. Capacity of the water harvesting structure was found to be 82.20 ha-cm which would have a command area of 28.5 ha for application of irrigation water during water deficit weeks.
 
Date 2016-09-14T14:46:00Z
2016-09-14T14:46:00Z
2009-12
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/76719
 
Language en
 
Format application/pdf
 
Publisher G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand)