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Lakshmanan, A.
- Rainfall Scenario in Future over Cauvery Basin in India
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Authors
Affiliations
1 Agro Climate Research Centre, Tamil Nadu Agricultural University, Coimbatore-3
1 Agro Climate Research Centre, Tamil Nadu Agricultural University, Coimbatore-3
Source
Indian Journal of Science and Technology, Vol 6, No 7 (2013), Pagination: 4966-4970Abstract
A study was undertaken for developing rainfall scenarios using the ensemble of all 16 different Global Climate Model outputs for A1b scenario for mid (2040-2069) and end (2070-2099) century. For the analysis, the entire Cauvery basin was demarcated into five smaller basins viz., Basin 1 (Upper Cauvery upto Mettur reservoir), Basin 2 (Bhavani basin from Mettur to Upper Anicut), Basin 3 (Amaravathy basin), Basin 4 (Upper Anicut to Grand Anicut) and Basin 5 (Downstream of Grand Anicut, including lower Anicut and the delta region). From the 16 Global Climate Model ensemble outputs, rainfall in the mid century is expected to increase in the SWM months starting from May through December in the order of 1 to 36% (Basin 1), 3 to 21% (Basin 2), 1 to 17% (Basin 3), 3 to 22% (Basin 4) and 4 to 22% (Basin 5). The same trend is expected in the end century with different magnitude. The South West Monsoon (JJAS) and post-monsoon rainfall (ONDJ) is expected to increase towards mid and end century whereas not much change is expected in the pre-monsoon rainfall in the future. Annual rainfall is expected to be 21, 11 and 7% more during mid century compared to the baseline (1981-2000) in the upper Cauvery (Basin 1), mid Cauvery (Basin 2, 3 and 4) and delta region (Basin 5) respectively. The rainfall would be higher by 33, 15 and 10% than the current quantity in the upper Cauvery, mid Cauvery and delta region respectively during end century. These results could contribute to the development of policies for future agricultural water management.Keywords
Cauvery Basin, Climate Model Ensemble, RainfallFull Text
References
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- Evaluation of Weather-Based Crop Insurance Products for Kharif Groundnut
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Authors
Affiliations
1 Agro Climate Research Centre, Tamil Nadu Agricultural University, Coimbatore 641 003, IN
1 Agro Climate Research Centre, Tamil Nadu Agricultural University, Coimbatore 641 003, IN
Source
Current Science, Vol 107, No 11 (2014), Pagination: 1866-1871Abstract
Weather-based crop insurance scheme (WBCIS) products proposed by four insurance providers was compared and evaluated using historical weather data for piloting WBCIS on kharif groundnut in Coimbatore, Dharmapuri, Theni, Tirunelveli and Virudhunagar districts of Tamil Nadu. Water deficits during the vegetative phases of groundnut crop generally delay flowering and maturity thereby reducing the crop growth and yield. The study revealed that the deficit rainfall risk was more pronounced in all the abovementioned districts, whereas the risk of excess rainfall impact could be clearly observed in Theni district. Though the occurrence of strike events was for phase- I of deficit rainfall cover, the rate per mm of rainfall fixed by IFFCO-TOKYO was quite low. The product designed for HDFC-ERGO and MS-Cholamandalam was similar, whereas the product for AIC and IFFCO-TOKYO was designed with little variation in context to excess rainfall cover and consecutive dry days. The compensation benefit realized by the farmers of Virudhunagar and Dharmapuri districts was higher followed by Theni because the compensation rate per mm of rainfall fixed by the company was higher, which favours the farmers.Keywords
Insurance Companies, Payout, Product Design, Strike Events.Full Text
- Assessment of Climate Change Impact on Rice Using Controlled Environment Chamber in Tamil Nadu, India
Abstract Views :254 |
PDF Views:94
Authors
Affiliations
1 Tamil Nadu Agriculture University, Coimbatore 641 003, IN
2 Bioforsk, Norwegian Institute for Agricultural and Environmental Research, Fr. A. Dahlsvei 20, NO-1430 Ås, NO
1 Tamil Nadu Agriculture University, Coimbatore 641 003, IN
2 Bioforsk, Norwegian Institute for Agricultural and Environmental Research, Fr. A. Dahlsvei 20, NO-1430 Ås, NO
Source
Current Science, Vol 112, No 10 (2017), Pagination: 2066-2072Abstract
Impacts of elevated temperature and carbon dioxide (CO2) enrichment on rice were assessed by carrying out an experiment with four dates of planting (1 June and 15 June, 1 and 15 July) during 2014 under two different environmental conditions, viz. ambient and modified (climate control chamber) with +4°C compared to the ambient temperature and CO2 enrichment of 650 ppm. Crops grown under modified environment recorded reduced growth characters (leaf area index, dry matter production, number of tillers m-2), lesser dry matter partitioning towards grain, yield attributes (number of productive tillers m-2, number of filled grains panicle-1) and lower grain yields compared to those grown under ambient condition. Crops subjected to elevated temperature and enriched CO2 attained panicle initiation, flowering and maturity earlier than those under open ambient condition.Keywords
Ambient and Modified Environment, Climate Change Impact, Elevated Temperature, Enriched Carbon Dioxide, Rice.Full Text
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