【摘要】：為了實(shí)時(shí)監(jiān)測(cè)作物漬害時(shí)空分布,以湖北省監(jiān)利縣作為研究對(duì)象,采用分布式水文土壤植被模型-DHSVM(Distributed Hydrology Soil Vegetation Model)將監(jiān)利縣分成若干90 m×90 m的柵格單元,通過計(jì)算每個(gè)柵格單元的水平衡,達(dá)到模擬農(nóng)田土壤水分狀況的目的,結(jié)合作物輕、中、重度3種漬害的水分特征指標(biāo)(地下水位埋深小于0.6 m,土壤表層相對(duì)體積含水率5 d的均值大于90%的持續(xù)期分別大于5、12、20 d)的方法,模擬監(jiān)利縣夏收作物不同漬害的時(shí)空分布。結(jié)果表明,模擬得到了2014年、2015年每年1—5月(夏收作物生長(zhǎng)期間)監(jiān)利縣農(nóng)田表層土壤水分和地下水位埋深的時(shí)空分布(時(shí)間分辨率為1 d,空間分辨率為90 m),首次實(shí)現(xiàn)了作物漬害的時(shí)空間分布信息提取;通過多次田間調(diào)查,證明此反演方法結(jié)果是準(zhǔn)確的。
[Abstract]:In order to monitor the temporal and spatial distribution of crop damage in real time, Jianli County, Hubei Province, was divided into several grid units of 90 m 脳 90 m by using distributed hydrological soil vegetation model (DHSVM (Distributed Hydrology Soil Vegetation Model). By calculating the water balance of each grid unit, the purpose of simulating the soil moisture status of farmland is achieved, and the water characteristic indexes of light, moderate and severe crop damage are combined (the buried depth of groundwater level is less than 0.6 m, and the depth of groundwater table is less than 0.6 m). The mean value of soil surface relative volume water content in 5 days was more than 90%, the duration of which was more than 512 ~ (12) days, respectively, to simulate the temporal and spatial distribution of different soakage damage of summer harvest crops in Jianli County. The results show that the temporal and spatial distribution of surface soil moisture and groundwater table depth (temporal resolution 1 d, spatial resolution 90 m),) in Jianli County is obtained from January to May of 2015 (during the growing period of summer harvest crops) in Jianli County, and the results show that the temporal resolution is 1 day and the spatial resolution is 90 m),. The extraction of spatial distribution information of crop waterlogging was realized for the first time. Through many field investigations, it is proved that the inversion method is accurate.
【作者單位】： 長(zhǎng)江大學(xué)農(nóng)學(xué)院;主要糧食作物產(chǎn)業(yè)化湖北省協(xié)同創(chuàng)新中心;
【基金】：2012年度公益性行業(yè)(農(nóng)業(yè))科研專項(xiàng)項(xiàng)目(201203032)
【分類號(hào)】：S422

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