内蒙古河套灌区农田水土环境安全因子限制下引黄水量阈值与环境预报研究

项目名称： 内蒙古河套灌区农田水土环境安全因子限制下引黄水量阈值与环境预报研究

项目编号： No.51469021

项目类型： 地区科学基金项目

立项/批准年度： 2015

项目学科： 水利工程

项目作者： 丁雪华

作者单位： 内蒙古农业大学

项目金额： 48万元

中文摘要： 内蒙古河套灌区面临引黄水量大幅减少的严峻形势，长期形成并在一定程度上趋于稳定的区域农田水土环境必将发生改变，寻求适合地区特点的区域农田水土环境预测方法，较客观的提出农田水土环境限制因子下灌区引黄水量的阈值，将对灌区生态农业可持续发展具有重要的科学及现实意义。研究以内蒙古河套灌区为背景，通过试验与资料总结提出农田水土环境安全下限制因子阈值；在灌区完善的长系列历史监测资料及先进的3S技术支撑下，评估田间试验条件下区域农田水土环境的变迁；以率定检验后的区域非饱和带及饱和带水流溶质运移模型为基础，构建适合地区特点的区域尺度非饱和-饱和农田水土环境耦合预测模型及其算法；预测满足农田水土环境阈值下研究区不同水平年生育期、秋浇期灌水量，较客观的提出河套灌区引黄水量的阈值；预报在引黄水量阈值条件下区域农田水土环境的中、长期变化趋势。研究结果将为地区生态环境及农业可持续发展战略的制定提供科学依据。

中文关键词： 水土环境；限制因子；耦合效应；阈值；预报

英文摘要： Hetao Irrigation Area is facing the severe situation that the water supply from Yellow River is reducing a lot, the long-term founded and balanced soil and water environment will be changed. It will be of great importance to the sustainable development for Hetao Irrigation Area to look for a soil and water environment prediction method that suit for regional characteristics and propose the threshold of the water supply from Yellow River under the restriction factors of soil and water environment. The research is under the background of Hetao Irrigation Area, through experiment and data summary, the limiting factor threshold under the farmland soil and water environment safety is put forward. With the strong support of 3S technology and well developed long-term observation data, combined with field experiment, the evolution of water and soil environment of the regional farmlands is assessed. Based on the flow and solute transferring model that calibrated and verified in unsaturated and saturated zones, the prediction coupling model and calculation method of unsaturated and saturated farmland soil and water environment in regional scale are developed. Predict the irrigation amount in different periods of crop growth and autumn irrigation with different hydrological year condition，which suit for the threshold of farmland soil and water environment. Propose the water supply threshold from Yellow River objectively. Forecast the medium and long-term trend of farmland soil and water environment of the area, under the threshold of water supply from Yellow River.The results could be used in formulating the ecological environmental and agricultural sustainable development in the area.

英文关键词： Water and Soil Environment;Restriction factor;Coupling Effect;Threshold;Prediction