河北省棉花灌溉需水量与灌溉需求指数分析

对不问水文年份作物需水量和灌溉需水量的分析能够为作物灌溉用水定额的制定、作物生育期的水分管理和农业水资源规划提供基础数据。该文基于河北省棉区的气象资料,采用FAO推荐的Penman—Monteith公式和作物系数法计算参照作物需水量和棉花需水量;利用水文计算应用最广的皮尔逊III型分布曲线,通过频率计算和配线法确定不同水文年份棉花生育期的有效降水量和需水量;据此分析不同水文年份棉花的灌溉需水量和灌溉需求指数。分析结果表明,河北省棉花多年平均需水量648.9mm,多年平均灌溉需水量190.6mm,多年平均灌溉需求指数0.29。枯水年(P=-75%)、平水年(P=50%)和丰水年(P=25%)河北...

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Published in农业工程学报 Vol. 29; no. 19; pp. 98 - 104
Main Author 刘玉春 姜红安 李存东 黄鹤 潘增辉 柴春岭
Format Journal Article
LanguageChinese
Published 河北农业大学城乡建设学院,保定,071001%保定中法供水有限公司,保定,071051%保定市气象局,保定,071000%河北水利科学研究院水资源与水环境研究所,石家庄,050051 2013
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ISSN1002-6819
DOI10.3969/j.issn.1002-6819.2013.19.012

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Summary:对不问水文年份作物需水量和灌溉需水量的分析能够为作物灌溉用水定额的制定、作物生育期的水分管理和农业水资源规划提供基础数据。该文基于河北省棉区的气象资料,采用FAO推荐的Penman—Monteith公式和作物系数法计算参照作物需水量和棉花需水量;利用水文计算应用最广的皮尔逊III型分布曲线,通过频率计算和配线法确定不同水文年份棉花生育期的有效降水量和需水量;据此分析不同水文年份棉花的灌溉需水量和灌溉需求指数。分析结果表明,河北省棉花多年平均需水量648.9mm,多年平均灌溉需水量190.6mm,多年平均灌溉需求指数0.29。枯水年(P=-75%)、平水年(P=50%)和丰水年(P=25%)河北省棉花灌溉需水量分别为299.1、182.8和84.7mm,灌溉需求指数分别为0.45、0.28和0.13。
Bibliography:11-2047/S
The analysis of water requirement and irrigation water requirement for crop in different hydrological years can provide a basis for determining the irrigation quota and for optimal water management in crop growing season. Based on some meteorological data in Hebei Province, water requirement and irrigation demand index of cotton were analyzed to provide detailed and targeted data for agricultural water resources planning of Hebei Province and for cotton optimal water management. Cotton water requirement (ETc) was estimated by using FAO Penman-Monteith equation and crop coefficient method. The average annual value of effective precipitation (Pc), cotton water requirement (ETc) and cotton irrigation demand (1R) in different cotton growth stages were statistically analyzed. And the effective precipitation (Pc), cotton water requirement (ETc) and cotton irrigation demand (IR) in different hydrological years were analyzed by P-III distribution frequency calculation with frequency analysis. According to th
ISSN:1002-6819
DOI:10.3969/j.issn.1002-6819.2013.19.012