区域尺度农田水盐动态模拟模型—GSWAP 被引量：20

Regional scale model for simulating soil water flow and solute transport processes-GSWAP

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摘要由于土壤和水文气象等因子的空间变异性,区域尺度的农田水盐动态难以应用小尺度一维模型进行模拟。该文将一维农田水文模型(soil-water-atmosphere-plantmodel,SWAP)与ArcInfo进行紧密结合,构建了区域尺度的农田水盐动态模拟模型-GSWAP。该模型利用GIS强大的空间数据分析与处理功能,可高效地进行模型数据的前后处理与分析。模型将研究区划分为多个均质单元进行模拟,并以RS反演的表土含水率和ETa为观测资料,运用遗传算法确定各单元等效土壤水力参数。该文以内蒙河套灌区永联试验区为背景,对GSWAP模型进行了应用分析。结果表明,应用GSWAP模型可高效地进行区域农田水盐动态模拟,实现数据输入输出、可视化显示与空间分析,且永联试验区的模拟结果具有合理性。 Due to the spatial variability of soil hydraulic properties and hydrological factors,field scale models with one-dimensional structure were not applicable to the regional scale modeling.A distributed model,which is named as GSWAP,was developed for simulating soil water flow and salt transport on a regional scale by closely coupling the Soil-Water-Atmosphere-Plant（SWAP） model and ArcInfo.The data of GSWAP can be efficiently pre/post processed based on the strong capabilities of spatial data analysis and processing in ArcInfo.The study area was divided into subunits through the combination of soil type,land use,climate and water table depth conditions.Each subunit was supposed to be an equivalent homogenous system with a set of effective soil hydraulic parameters,which were obtained by using the Genetic Algorithms coupled with SWAP model.Finally,the GSWAP model was applied to the Yonglian Irrigation System,Hetao Irrigation District of Inner Mongolia as a case study.Results showed that the GSWAP model could be efficiently used to simulate the soil water and solute dynamics on a regional scale.

作者徐旭黄冠华屈忠义黄权中

机构地区中国农业大学水利与土木工程学院中国-以色列国际农业研究培训中心内蒙古农业大学水利与土木建筑工程学院

出处《农业工程学报》 EI CAS CSCD 北大核心 2011年第7期58-63,共6页 Transactions of the Chinese Society of Agricultural Engineering

基金国家自然科学基金项目(5079106) 公益性行业科研专项(200901083) 十二五国家科技支撑计划课题中央高校基本科研业务费专项资金项目资助(2011JS122)资助

关键词区域尺度 GIS 遗传算法土壤水力特性 SWAP模型模拟 regional scale GIS genetic algorithms soil hydraulic property SWAP simulation

分类号 S271 [农业科学—农业水土工程]

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