Spatio-Temporal Variation of Soil Water Reservoir Capacity on Loess Hilly Region Using GIS Techniques

JIAO Feng; WEN Zhong-ming; WANG Yong; CHEN Yun-ming

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Spatio-Temporal Variation of Soil Water Reservoir Capacity on Loess Hilly Region Using GIS Techniques

更新时间：2024-11-07

- Spatio-Temporal Variation of Soil Water Reservoir Capacity on Loess Hilly Region Using GIS Techniques
- Vol. 21, Issue 3, Pages: 128-132(2007)
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  CLC： S152.7S165.25
- Published：2007
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JIAO Feng, WEN Zhong-ming, WANG Yong, et al. Spatio-Temporal Variation of Soil Water Reservoir Capacity on Loess Hilly Region Using GIS Techniques[J]. 2007, 21(3): 128-132.
DOI：

JIAO Feng, WEN Zhong-ming, WANG Yong, et al. Spatio-Temporal Variation of Soil Water Reservoir Capacity on Loess Hilly Region Using GIS Techniques[J]. 2007, 21(3): 128-132. DOI：

摘要

以空间图形和数据库为基础

利用GIS将安塞县的土壤水分样点数据与地理数据结合起来

建立不同利用类型-土地类型-坡度分级的浮点型土壤含水率字段

对安塞县域尺度土壤水分制图及其定量化方法进行了研究和探讨;对安塞县不同土层土壤水分状态和分布进行了定量分析。结果表明：0～60 cm土层

雨季前

土壤水分基本处于极难效或难效状态;雨季后

土壤水分基本处于迟效或速效状态;土壤水分补偿率高。60～120 cm土层

雨季前

土壤水分主要为极难效水、难效水和迟效水;雨季后

土壤水分基本处于迟效和速效状态;土壤水分补偿率小于上层。120～200 cm土层

雨季前

土壤水分主要为极难效水、难效水和迟效水;雨季后

土壤水分基本处于难效水、迟效水和速效状态;土壤水分补偿率明显小于上层。200～300 cm土层

雨季前

土壤水分主要为极难效水和难效水;雨季后

土壤水分基本处于极难效和难效状态;土壤水分补偿率很小。300～500 cm土层

雨季前

土壤水分主要为极难效水、难效水和迟效水;雨季后

土壤水分基本处于极难效、难效状态和迟效状态;土壤水分基本不能得到补偿

处于基本稳定状态。

Abstract

Soil water is crucial to plant growth and plays a vital role in re-vegetation.Based on spatial databases and sampled soil moisture data

a method was developed to relate the sampled soil water data to different combinations of land typeland use-slope grade thus getting using GIS techniques

and maps were made indicating the spatial variation of soil water in different soil layers.Using these maps

we calculated the amount and distribution of average soil water content in different soil layers in Ansai county.The results showed: Soil moisture is at its bally difficult-available and difficult-available state before rainy season and at its slow-available and quick-available state after rainy season in soil layer of 0~60 cm.Compensatory rate of soil moisture is high.Soil moisture is at its bally difficult-available

difficult-available and slow-available state before rainy season and at its slow-available and quick-available state after rainy season in soil layer of 60~120 cm.Compensatory rate of soil moisture in this layer is lower than that in up-layer.Soil moisture is at its bally difficult-available

difficult-available and slow-available state before rainy season and at its difficult-available

slow-available and quick-available state after rainy season in soil layer of 120~200 cm.Compensatory rate of soil moisture in this layer is lower than that in up~layer evidently.Soil moisture is at its bally difficult-available and difficult-available state before rainy season and after rainy season in soil layer of 200~300 cm.Compensatory rate of soil moisture in this layer is very low.Soil moisture is at its bally difficult-available

difficult-available and slow-available state before rainy season and after rainy season in soil layer of 300~500 cm.Soil moisture of this layer can hardly be compensated and is steady state.

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