[1]王子涵,龚 铭,赵炯昌,等.黄土残塬沟壑区人工林小流域土壤水分时空变化特征[J].水土保持研究,2025,32(01):92-100.[doi:10.13869/j.cnki.rswc.2025.01.009]
　Wang Zihan,Gong Ming,Zhao Jiongchang,et al.The spatiotemporal variations in soil moisture of artificially afforested areas in small watershed of the gully region in the Loess Plateau[J].Research of Soil and Water Conservation,2025,32(01):92-100.[doi:10.13869/j.cnki.rswc.2025.01.009]
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黄土残塬沟壑区人工林小流域土壤水分时空变化特征

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 32 期数: 2025年01期 页码: 92-100 栏目: 出版日期: 2025-01-10
Title:
The spatiotemporal variations in soil moisture of artificially afforested areas in small watershed of the gully region in the Loess Plateau
文章编号:
1005-3409(2025)01-0092-09
作者:
王子涵1,2, 龚 铭1, 赵炯昌1,2, 池金洺1,2, 朱洪盛1,2, 左启林3, 王丽平1,2, 王百群4, 于 洋1,2
(1.北京林业大学 水土保持学院, 北京 100083; 2.山西吉县森林生态系统国家野外科学观测研究站, 北京 100083; 3.中建一局集团第三建筑有限公司, 北京 100161; 4.中国科学院 水利部 水土保持研究所, 陕西 杨凌 712100)
Author(s):
Wang Zihan1,2, Gong Ming1, Zhao Jiongchang1,2, Chi Jinming1,2, Zhu Hongsheng1,2, Zuo Qilin3, Wang Liping1,2, Wang Baiqun4, Yu Yang1,2
(1.School of Soil and Water Conservation,Beijing Forestry University,Beijing 100085,China; 2.Jixian National Forest Ecosystem Observation and Research Station,CNERN,School of Soil and Water Conservation,Beijing Forestry University,Beijing,100085,China; 3.The Third Construction Co.,Ltd.,China Construction First Group,Beijing 100161,China; 4.Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources,Yangling,Shaanxi 712100,China)
关键词:
黄土高原;  土壤水分;  空间插值;  空间分布
Keywords:
Loess Plateau;  soil moisture;  spatial interpolation;  spatial distribution of soil moisture
分类号:
S157.1
DOI:
10.13869/j.cnki.rswc.2025.01.009
文献标志码:
A
摘要:
[目的]了解残塬沟壑小流域土壤水分的时空分布特征,开展生态建设和探究水文过程对气候—植被—地貌综合效应的敏感性至关重要。[方法]以地处山西吉县蔡家川的人工林小流域为研究区,基于流域尺度野外定位监测与地统计等方法,分析了小流域土壤水分时空变化特征。[结果](1)研究时段内总降雨历时为308 h,累计降雨量311.1 mm,占全年降雨量的77.95%,小流域土壤水分变化具有明显的垂直分异特征。(2)采用有序最优分割法将人工林小流域土壤水分分为三层,其中,0—10 cm为土壤水分活跃层,其体积含水量均值为(13.91±4.08)cm3/cm3(CV=29%),10—80 cm为土壤水分次活跃层,其体积含水量均值为(16.28±5.01)cm3/cm3(CV=31%),80—180 cm为土壤水分调节层,其体积含水量均值为(14.25±1.89)cm3/cm3(CV=13%)。(3)人工林小流域不同深度土壤水分呈现出西北低、东南高的特点。反距离权重法土壤水分空间插值的精确度最高,纳什系数为0.52,均方根误差为2.04。[结论]蔡家川人工林小流域的水分空间分布受到地形、降水和植被等多方面因素的影响,水分空间分布总体上呈现出东南高、西北低的特点。
Abstract:
[Objective]Soil moisture plays a vital role in influencing vegetation recovery, particularly in the loess plateau gully erosion region, where hydrological processes are highly responsive to the combined effects of climate, vegetation, and topography. The aims of this study are to understand the spatiotemporal distribution characteristics of soil moisture at the watershed scale, and to advance ecological construction efforts. [Methods]This research investigated the artificial afforestation watershed in Caijiachuan, Jixian County, Shanxi Province, based on the soil moisture positioning monitoring platform. By conducting watershed-scale field positioning monitoring and employing various geostatistical analysis methods, we systematically gathered soil moisture datasets of growing season in the afforested watershed in 2023. Employing diverse interpolation techniques, we analyzed the spatiotemporal variations of soil moisture at the small watershed scale. [Results]The small watershed-scale soil moisture changes were highly responsive to rainfall, showcasing distinct vertical stratification characteristics. The soil moisture content in the Caijiachuan afforestation watershed was categorized into three layers:the active soil moisture layer(0—10 cm), the sub-active soil moisture layer(10—80 cm), and the soil moisture regulation layer(80—180 cm). The sub-active soil moisture layer exhibited the highest coefficient of variation, while the soil moisture regulation layer had the lowest variation coefficient. The active soil moisture layer was predominantly influenced by climate, the sub-active layer served as the primary layer for vegetation water absorption, and the regulation layer primarily functions as a water storage layer. In terms of interpolation method selection, the inverse distance weighting method yielded the most accurate results for the spatial distribution of soil moisture within the watershed, with a Nash coefficient of 0.64 and a root mean square error of 3.22, establishing it as the preferred interpolation method among the four considered. Upon stratifying the soil in the Caijiachuan afforestation watershed into three layers and conducting interpolation analysis, It was observed that the sub-active soil moisture layer had the highest water content, while the active soil moisture layer had the lowest water content. [Conclusion]The spatial distribution of water in the study area is influenced by many factors such as topography, precipitation and vegetation, and the spatial distribution of water is generally characterized by high in the southeast and low in the northwest.

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备注/Memo

收稿日期:2024-03-13 修回日期:2024-03-30
资助项目:国家自然科学基金(42177310; 42377331); 国家重点研发计划(2023YFF1305101)
第一作者:王子涵(2002—),男,内蒙古克什克腾旗人,硕士研究生,主要从事水土保持与流域治理研究。E-mail:wzh0301208@gmail.com
通信作者:于洋(1985—),男,河北承德人,博士,副教授,主要从事水土保持与流域治理研究。E-mail:yangyu@bjfu.edu.cn；王百群(1968—),男,陕西渭南人,副研究员,主要从事土壤养分循环研究。E-mail:bqwang@ms.iswc.ac.cn

更新日期/Last Update: 2025-01-10