摘要
基于南宁、北海、玉林、龙州4个气象站的长系列气象资料以及2014-2015年木薯生育期的观测资料,采用Penman-Monteith公式计算了木薯主产区内参考作物和木薯各生育期的需水量,采用经验公式计算木薯主产区内木薯各生育期的有效降雨量,并进行排频得到不同水平年各主产区木薯生育期需水量与有效降雨量,计算分析各主产区内木薯的灌溉需求指数。结果表明:广西木薯主产区木薯多年平均需水量为770.18 mm,灌溉需求指数0.14,丰水年(P=25%)、平水年(P=50%)、枯水年(P=75%)木薯需水量分别为704.91、758.88和866.05 mm,灌溉需求指数分别为0、0.17和0.39。
Based on the weather information recorded from 1958 to 2015 by four meteorological stations in Nanning, Beihai, Yulin and Longzhou and the observation data in the cassava growth period from 2014 to 2015, the Penman-Monteith formula is used to calculate the water requirement of cassava in its each growth period. The effective rainfall empirical formula is used to calculate the effective precipitation in the main cassava production area. And the effective precipitation, cassava water requirement and cassava irrigation demand in different hydrological years are analyzed by P-Ⅲ distribution frequency calculation with frequency analysis. The results show that: the average water requirement of cassava growth period is 770.18 mm, and the water requirement in wet year (P=25%), in median year (P=50%) and in dry year (P=75%) are 704.91, 758.88 and 866.05 mm respectively for the study area. The average annual cassava irrigation demand index (IDI) for the study area is 0.14, and the cassava irrigation demands in the wet year (P=25%), in the median year (P=50%) and in the dry year (P=75%) are 0, 0.17 and 0.39 respectively for the study area.
作者
吴卫熊
黄奕
WU Wei xiong;HUANG Yi(School of Water Resources and Hydropower Engineering,Hebei University of Engineering,Handan 056038,Hebei Province,China;Key Laboratory of Water Engineering of Guangxi,Nanning 530023,China;Hohai University,Nanjing 210098,China)
出处
《中国农村水利水电》
北大核心
2019年第10期123-126,共4页
China Rural Water and Hydropower
基金
广西重点研发计划(桂科AB16380257)
关键词
木薯
木薯灌溉
有效降雨
木薯需水量
灌溉需求指数
cassava
cassava irrigation
effective precipitation
water requirement of cassava
irrigation requirement index
作者简介
吴卫熊(1982-),男,高级工程师,博士,从事节水灌溉理论与技术研究。E-mail:99677226@qq.com。
