摘要
针对现有旱涝急转定义难以描述灌区(特别是水稻灌区)旱涝急转实际情况的问题,综合考虑旱涝急转的气象过程、土壤水动力学过程和作物需水过程,给出了一种新的旱涝急转定义,该定义具备灌区旱涝急转形成的三大要素特征。以安徽省五道沟地区为研究对象,采用Hydrus模型模拟了水稻灌区的土壤水分过程与内涝积水过程,筛选出该地区水稻不同生育阶段发生的旱涝急转事件,并分析了其具体发生过程。不同旱涝急转定义的对比表明了本文给出的旱涝急转定义所筛选结果的准确性和合理性,可用于旱涝急转灾害频发地区的研究。
Contraposing the fact that existing definitions of drought and flood alternation are hard to describe the actual phenomenon,this paper gives a new definition considering three important features ： meteorological process,soil dynamics process and crop water requirement process. This case study takes Wudaogou area in Anhui Province as research object,simulated soil moisture process and water logging process in rice irrigation,filtered out drought and flood alternating events in different rice growth period,and analyzed the particular process.The new definition results were more accurate and reasonable comparing with previous definitions,therefore the new definition can be used in areas where drought and flood alternation happened frequently.
作者
陈灿
胡铁松
高芸
黄洁
CHEN Can;HU Tie-song;GAO Yun;HUANG Jie(State Key Laboratory of Water Resources and Hydropower Engineering of Wuhan University,Wuhan 430072,Chin)
出处
《中国农村水利水电》
北大核心
2018年第7期56-61,共6页
China Rural Water and Hydropower
基金
国家自然科学基金重点项目(51339004)
关键词
水稻
旱涝急转
土壤墒情
生育期
rice
drought and flood ahernation
soil moisture
growth period
