1. 内蒙古农业大学水利与土木建筑工程学院,呼和浩特,010018
2. 内蒙古自治区水资源保护与利用重点实验室,呼和浩特,010018
3. 内蒙古自治区通辽市牧区水利工作站,内蒙古,通辽,028000
[ "王宇祥(1994-),男,硕士研究生,主要从事干旱区生态水文研究。E-mail:18347927303@163.com" ]
纸质出版:2020
移动端阅览
王宇祥, 刘廷玺, 段利民, 等. 科尔沁不同类型沙丘土壤水分时空变化特征及其环境影响因子[J]. 水土保持学报, 2020,34(6):125-134.
WANG Yuxiang, LIU Tingxi, DUAN Limin, et al. Temporal and Spatial Variation Characteristics of Soil Moisture and Environmental Impact Factors in Different Types of Dunes in Horqin[J]. 2020, 34(6): 125-134.
王宇祥, 刘廷玺, 段利民, 等. 科尔沁不同类型沙丘土壤水分时空变化特征及其环境影响因子[J]. 水土保持学报, 2020,34(6):125-134. DOI: 10.13870/j.cnki.stbcxb.2020.06.019.
WANG Yuxiang, LIU Tingxi, DUAN Limin, et al. Temporal and Spatial Variation Characteristics of Soil Moisture and Environmental Impact Factors in Different Types of Dunes in Horqin[J]. 2020, 34(6): 125-134. DOI: 10.13870/j.cnki.stbcxb.2020.06.019.
为了深入探究半干旱地区沙丘土壤水分时空变化特征及其与环境因子关系,以科尔沁沙地为研究区,综合运用原位观测、数值模拟和冗余分析等方法,对沙丘土壤水分的时空变化特征、变异性、水平衡及其与环境因子的定量关系进行研究。结果表明:沙丘土壤水分在垂直剖面呈现出由半流动沙丘"镜像S "形逐渐过渡为阴坡固定沙丘" S"形的趋势,在时间尺度上呈"正态分布"形;半流动、半固定和阴坡固定沙丘土壤水分变异性随深度的增加逐渐减弱,半阳坡固定沙丘呈"S"形分布,最大变异系数为75.45%,均属中等变异;半流动和半固定沙丘水分主要消耗于深层渗漏,分别占总水量的57.35%和54.56%,半阳坡固定和阴坡固定沙丘水分主要消耗于植被蒸腾,分别占总水量的77.15%和54.88%;沙丘土壤水分影响因子具有差异性,容重、砂粒含量、粉粒含量和饱和导水率是影响半流动、半固定和半阳坡固定沙丘土壤水分的主要环境因子,而有机质、砂粒含量、粉粒含量和饱和导水率是阴坡固定沙丘土壤水分的主要影响因子。研究表明,半阳坡固定沙丘小叶锦鸡儿易消耗深层土壤水,造成土壤干燥化,草本和半灌木有利于深层土壤水分保持。
In order to deeply explore the temporal and spatial variation characteristics of soil moisture in dunes in semi-arid areas and its relationship with environmental factors
this study selected the Horqin Sandy Land
as the study area. Based on in-situ observation
numerical simulation
and redundant analysis
the temporal and spatial variation characteristics
variability
water balance and quantitative relationship of the environmental factors of soil moisture in dune were studied. The results showed that the soil moisture in the dune shows a trend of a gradual transition from a "mirror S" type of moving sand dunes to an "S" type of fixed dunes
and a "normal distribution" on the time scale. The soil water variability of the semi-flow
semi-fixed
and shady fixed dune gradually decreased with the increase of depth
and the half sun slope fixed dune showed an "S" type distribution with a maximum coefficient of variation of 75.45%
all of which were moderately variable. The water in the semi-flow and semi-fixed dunes was mainly consumed by deep leakage
accounting for 57.35% and 54.56% of the total water
respectively. The half sun slope fixed and shady fixed dunes moisture was mainly consumed in vegetation transpiration
accounting for 77.15% and 54.88% of the total water. The factors affecting soil moisture in dune were different. Bulk density
sand content
silt content
and saturated hydraulic conductivity were the main factors affecting soil moisture in semi-flow
semi-fixed
and shady fixed dunes. However
organic matter
sand content
silt content
and saturated hydraulic conductivity were the main influencing factors of soil moisture in the half sun slope fixed dunes. Study showed that the half sun slope fixed dunes are easy to consume the deep soil water
causing soil desiccation
and herbs and semi-shrubs are conducive to deep soil moisture retention.
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