区域土壤水资源评价研究进展

Research Progress of Regional Soil Water Resources Evaluation

土壤水作为水资源的一种,其研究意义与应用价值逐步得到重视,但土壤水资源评价的研究仍显不足。土壤含水量可通过直接计算或间接反演获得,评价方法应以区域水量平衡为基础,采用循环量或可更新量等指标来表征资源的数量,并区分天然补给和人工灌溉对土壤水分变化的影响。在此基础上,采用分布式水文模型、遥感等工具,耦合土壤水分运动模型,实现尺度转换,结合土壤水资源质量评价获取不同时空尺度土壤水资源的分布。

Being as a part of water resources,the research significance and application value of soil water have been paid more attention pro gressively,but the study about assess the soil water still shows insufficient. Soil water content can be obtained through direct calculation or indirect inversion,but as an important part of hydrologic cycle,soil water is linked with regional national economy. Hydrologic budget should be regarded as the foundation of evaluation methodology,using indexes like the circulation volume and refresh water resource to characterize the quantity of resource,and the influence on soil water from natural recharge and manual irrigation should be distinguished. Some tools like Distributed Hydrological Model and remote sensing had been utilized,coupled soil water movement model to achieve the scale transformation,and combined with the quantity evaluation of soil water resources to acquire the distribution of soil water resources under different spatial and temporal scales.