| 基于土壤墒情模拟的农业干旱动态评估 |
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| 引用本文： | 尹正杰,黄薇,陈进.基于土壤墒情模拟的农业干旱动态评估[J].灌溉排水学报,2009,28(3). |
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| 作者姓名： | 尹正杰 黄薇 陈进 |
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| 作者单位： | 长江科学院水资源研究所,武汉,430010
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| 基金项目： | 水利部公益性行业科研专项经费项目，长江科学院基金，长江科学院公益性科研项目 |
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| 摘 要： | 已有的农业干旱研究中,土壤墒情的模拟与干旱程度的动态评估常常是独立进行的,二者并没有统一起来。基于此,建立了田间土壤水分平衡模型,通过作物生育期内的土壤水分模拟农业干旱过程。为了将土壤墒情模拟与农业干旱的动态评估统一起来,引入了阶段性的作物水分生产函数,通过干旱缺水对农业产量影响的定量分析,反推得出作物不同生育阶段土壤水分状况对应的干旱程度和缺水权重,从而将土壤墒情模拟与农业干旱评估结合起来,达到农业干旱动态模拟与评估的目的,为从土壤墒情状况实时动态评估农业干旱程度提供了一种便捷可行的方法。最后将提出的模型方法结合某灌区进行了应用,效果较好。
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| 关 键 词： | 土壤墒情 农业干旱 干旱评估 |
Dynamic Evaluation of Agricultural Drought Based on Soil Moisture Simulation |
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| YIN Zheng-jie,HUANG Wei,CHEN Jin.Dynamic Evaluation of Agricultural Drought Based on Soil Moisture Simulation[J].Journal of Irrigation and Drainage,2009,28(3). |
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| Authors: | YIN Zheng-jie HUANG Wei CHEN Jin |
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| Institution: | Water Resources Department;Yangtze River Scientific Research Institute;Wuhan 430010;China |
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| Abstract: | Soil moisture simulation and dynamic evaluation of drought degree are separated,and they are not integrated as a whole in the previous study of agricultural drought.So in this paper a farm soil moisture balance model is built to simulate soil moisture during crop's growth stages.And drought degrees response to soil moisture conditions and weights of soil moisture deficiency at different crop growth stages are obtained by inversion through quantitative analysis of impacts of water deficiency on yields based ... |
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| Keywords: | soil moisture agricultural drought drought evaluation |
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