Calculating Spatio-spatial Distribution of Waterlogged in Jianli County Using the DHSVM Model
XIONG Qinxue
TIAN Xiaohai
ZHU Jianqiang
Abstract：We calculated the spatio-spatial distribution of waterloggingin Jianli County of Hubei province using the DHSVM model (The Distributed Hydrology Soil Vegetation Model). The region in the county was divided in-to a number of grids, each being 90 m×90 m. The dynamic of soil moisture in each grid was simulated using a wa-ter balance model. We calculated the distribution of waterlogging in summer by classifying the waterlogging into three categories when the groundwater table was less than 0.6 m deep:when the duration of five-day average vol-umetric water higher than 90%lasted more than 5 days (light waterlogging), or lasted more than 12 days (moder-ate waterlogging), or lasted more than 20 days (severe waterlogging). We simulated the distribution of soil mois-ture and groundwater table in all grids from January to May in 2014 and 2015 during the growing season of sum-mer crops using a temporal resolution of one day. These results enabled us to predict the spatio-temporal distribu-tion of waterlogging in the region for the first time. This retrieval method was proven accurate after testing in sev-eral fields.
Keywords：sub-surface waterlogged hazardsDHSVM modelspatial-temporal distribution
Publication Date：2017-01-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：8( 109-116 )