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Nandagiri, Lakshman
- Analysis of Historical Trends in Hydrometeorological Variables in the Upper Cauvery Basin, Karnataka, India
Abstract Views :203 |
PDF Views:71
Authors
Affiliations
1 Department of Civil Engineering, ACS College of Engineering, Kambipura, Mysore Road, Bengaluru-560 074, IN
2 Department of Applied Mechanics and Hydraulics, National Institute of Technology Karnataka, Surathkal 575 025, IN
1 Department of Civil Engineering, ACS College of Engineering, Kambipura, Mysore Road, Bengaluru-560 074, IN
2 Department of Applied Mechanics and Hydraulics, National Institute of Technology Karnataka, Surathkal 575 025, IN
Source
Current Science, Vol 112, No 03 (2017), Pagination: 577-587Abstract
The present study examines the significance and magnitude of trends in the monthly rainfall, monthly mean maximum and minimum daily temperatures and streamflow in the Upper Cauvery Basin, Karnataka for a 30-year period, i.e. 1981-2010. Using observed data from 33 rain gauges, 6 climate stations and 4 stream gauging sites, statistical parameters -coefficient of variation (CV) and percentage departure have been calculated for average monthly values separately for three decades. As expected, CV of rainfall showed large variations from December to March, while the percentage departure also varies during these months for different decades. Statistically significant trend was observed in maximum temperature for Chikmagalur and Hassan stations. CV of minimum daily temperature showed large variability from November to March for all climate stations and also a significant increasing trend for Hassan and Bengaluru stations, while for Madikeri a decreasing trend was observed with a variation of -0.16°C/year. Not much variation was found for streamflow, except in K. M. Vadi and T. Narasipur gauge sites, which showed significant decreasing trend of -0.778 m3/s/year. Long-range dependence analysis revealed a weak persistence for both rainfall and streamflow of the basin. Results provide information regarding historical climate trends in the Upper Cauvery Basin, which can form the basis for projecting likely future trends and preparing plans for climate change mitigation and adaptation.Keywords
Climate Change Mitigation, Historical Climate Trends, Hydrometeorological Trends, Statistical Analysis.Full Text
- Historical Development of Irrigated Agriculture under The Malaprabha Project, Karnataka, India
Abstract Views :228 |
PDF Views:84
Authors
Affiliations
1 Department of Applied Mechanics and Hydraulics, National Institute of Technology Karnataka, Surathkal 757 025, IN
1 Department of Applied Mechanics and Hydraulics, National Institute of Technology Karnataka, Surathkal 757 025, IN
Source
Current Science, Vol 119, No 7 (2020), Pagination: 1149-1158Abstract
The present study analyses the historical development of irrigated agriculture in the command area of the Malaprabha irrigation project located in a semi-arid region of Karnataka, India. Considering the historical period from 1965 to 2014, spatio-temporal changes in irrigated area, cropping patterns, crop and irrigation water requirements using CROPWAT model and sources of irrigation water were characterized relative to the pre-project period at decadal time-step. Overall results indicate an increase in irrigated area, departure from the planned cropping pattern and a shift towards cultivation of water-intensive cash crops, canal releases not conforming to estimated irrigation water requirements and an increase in groundwater-based irrigation in the command area of the project. The findings of this study can be used to formulate more effective management strategies to improve the efficiency of the project and promote sustainable development of natural resources.Keywords
Command Area, Cropping Patterns, Groundwater, Historical Development, Irrigated Agriculture.Full Text
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