区域土壤水贮量及旱情预报  

Prediction of Regional Soil Water and Drought

作　　者：李保国[1] 

机构地区：[1]北京农业大学土地资源系

出　　处：《水科学进展》1991年第4期264-270,共7页Advances in Water Science

摘　　要：本文对传统的土壤水均衡方程进行了改进,把二维空间坐标(x,y)引入到土壤水均衡方程中,建立了分布式土壤水均衡方程,可进行区域土壤水贮量分布动态的计算与预报。利用地理信息系统(GIS)技术,实施了所建立的区域土壤水贮量预报模型。根据作物对土壤水的要求,进一步求得了区域土壤旱情分布图。此方法已实际应用于黄淮海平原曲周研究区。A distributive model of soil water balance is developed, which introduces 2-D Cartesian coordinates (x, y) into general soil water balance equation. Thus the dynamic distribution of regional soil water can be predicted. The model has been implemented by using GIS (geographic information system) techniques. Furthermore, the maps of regional soil drought are obtained based on the model and the needs of crops on soil water. The method has been applied to the Quzhou, Experimental Area in the Huang-Huai-Hai Plain of China.

关 键 词：土壤 水分 贮量 干旱 预报 

分 类 号：S152.75[农业科学—土壤学]