基于hydrus-1d模型的黄骅盐碱地土壤水盐运移模拟研究based on hydrus 1 d model (saline-alkali soil water and salt migration simulation studies.docx

选用2015年9月10日至2015年10月9日进行模型验证,得到较好的拟合效果。对研究区土壤灌水洗盐状况进行预测,按设计灌水量,七次灌水之后,常郭乡(CG)剖面
∥m2,,渗滤液与作物
。因此,按目前的灌溉量,灌区表层土壤在2015年的农田灌溉中,。补给量明显小于排泄量,盐分均衡为负均衡,说明通过农业种植及灌水洗盐,,灌水洗盐的效果较为明显。经预测,'L。说明按当前的农业种植及灌水洗盐方式,9年之后土壤中的盐分大量减少,达到灌水洗盐的目的。
关键词:盐碱地:土壤水盐运移;HYDRUS一1D模型;黄骅市
万方数据
Study on the Transport of Soil Water and Salt Based on HYDRUS一1D Model in
Huanghua City
Name:Mao Xiaoxi
Supervisor:Associate professor Wang Shutao Lecture Cui Jianghui
Major:Soil Science
Abstract
According to the problems of lOW crop yield duing to soil salinization and unreasonable study takes the soils with different degree of salinization as study subject, analysed the rules of soil water and salt movement of different salinity( eCkg,, ,,),in order to determine the reasonable irrigation and guide local agricultural paper takes Huanghua city of Hebei Province as an example,based on the collection of soil salinization the salinization a number of laboratory tests to determine the parameters of soil water movement and its
v撕ation;according to soil column simulation soil water and salt dynamics,
compared the variation of soil water and salt of every layers during the irrigation period; based on the indoor soil column bined with HYDURS—l D for numerical simulation of soil water and salt,to predict the state of soil water and salt movement,in order to achieve the purpose of irrigation for salt leaching,provide theoretical basis and suggestions for guiding the development of local main research results are as follows:
(1)Soil hydraulic property parameters of typical profile included soil water characteristic capacity,water diffusivity,unsaturated hydraulic conductivity and vertical infiltration rate were measured by laboratory test order to