Spatiotemporal variation of soil moisture in different ecological regions of Ningxia and their influencing mechanisms from 2003 to 2022

Yang Qiulin; Mi Lina; Liu Yuzhong; Qiu Sihan

doi:10.13961/j.cnki.stbctb.2025.02.012

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Spatiotemporal variation of soil moisture in different ecological regions of Ningxia and their influencing mechanisms from 2003 to 2022

- Spatiotemporal variation of soil moisture in different ecological regions of Ningxia and their influencing mechanisms from 2003 to 2022
- Bulletin of Soiland Water Conservation Vol. 45, Issue 2, Pages: 102-113(2025)
- 作者机构：
  
  1. 宁夏大学土木与水利工程学院,宁夏,银川,750021
  2. 宁夏大学生态环境学院,宁夏,银川,750021
  3. 西北土地退化与生态恢复国家重点实验室培育基地,宁夏,银川,750021
  4. 宁夏回族自治区惠农渠管理处,宁夏,石嘴山,753001
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2025.02.012
  CLC： Q948.113
- Online First：16 May 2025，
  
  Published：2025
- 稿件说明：
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Yang Qiulin, Mi Lina, Liu Yuzhong, et al. Spatiotemporal variation of soil moisture in different ecological regions of Ningxia and their influencing mechanisms from 2003 to 2022[J]. Bulletin of Soiland Water Conservation, 2025, 45(2): 102-113.
DOI：

Yang Qiulin, Mi Lina, Liu Yuzhong, et al. Spatiotemporal variation of soil moisture in different ecological regions of Ningxia and their influencing mechanisms from 2003 to 2022[J]. Bulletin of Soiland Water Conservation, 2025, 45(2): 102-113. DOI： 10.13961/j.cnki.stbctb.2025.02.012.

摘要

[目的] 探究宁夏回族自治区不同生态分区土壤水分的时空变化及其影响机制，为该地区生态建设与水资源管理提供科学依据。[方法] 以宁夏回族自治区为研究区，基于2003—2022年遥感反演土壤水分、气象、植被覆盖NDVI、土地利用等数据，采用趋势分析、突变检验、Hurts指数以及参数最优地理探测器，探究土壤水分的时空变化及其影响机制。[结果] ①2003—2022年，宁夏回族自治区全区年均土壤水分呈显著上升趋势，增加区域占68.99%，减少区域占31.01%。从不同分区看，北部引黄灌区土壤水分缓慢下降(-0.022%/a)，中部干旱带缓慢上升(+0.030%/a)，南部山区显著上升(+0.107%/a)，且2012年发生突变。空间分布上，土壤水分呈现“北部、南部高、中部低”的分布特征，多年平均土壤水分依次为北部引黄灌区(11.40%)＞南部山区(10.70%)＞中部干旱带(8.40%)。②基于Hurts指数预测结果，未来北部引黄灌区、中部干旱带、南部山区分别约有49.09%，60.43%，62.91%的区域土壤水分将减少，需关注北部引黄灌区和中部干旱带的盐渍化及干旱风险。③最优参数地理探测器分析表明，NDVI和地形是影响土壤水分分布的主要因素，其中降水的影响随时间逐渐增强。[结论] 2003—2022年宁夏回族自治区土壤水分变化趋势呈现出一定的区域差异性和复杂性，未来土壤水分变化也将呈现显著的区域差异性。NDVI、地形、降水等因素共同影响着其时空分布。未来应综合考虑这些因素，制定科学的土壤资源管理策略，助力生态建设与水资源优化。

Abstract

[Objective] Temporal and spatial changes in soil water in different ecological zones of the Ningxia Hui Autonomous Region and their influencing mechanisms were explored to provide a scientific basis for ecological construction and water resource management in this region. [Methods] Taking the Ningxia Hui Autonomous Region as the research area

based on remote sensing inversion data of soil moisture

meteorology

vegetation cover NDVI

and land use from 2003 to 2022

trend analysis

the mutation test

Hurts index

and parameter optimal geographic detector were used to explore the temporal and spatial changes of soil moisture and their influencing mechanism. [Results] ① From 2003 to 2022

annual soil moisture in Ningxia showed a significant upward trend

with 68.99% of the region experiencing increases and 31.01% experiencing decreases. Regionally

soil moisture declined slightly in the Northern Yellow River irrigation area (-0.022%/a)

increased modestly in the central arid zone (+0.030%/a)

and increased significantly in the southern mountainous area (+0.107%/a)

with a significant change in 2012. Spatially

soil moisture was high in the north and south and low in the center

with multi-year averages ranked as follows: Northern Yellow River irrigation area (11.40%) > southern mountainous area (10.70%) > central arid zone (8.40%). ② Hurst index predictions suggested that 49.09%

60.43%

and 62.91% of the northern

central

and southern regions

respectively

are likely to experience declining soil moisture

highlighting the risks of salinization and drought in the north and center. ③ Geographic detector analysis identified NDVI and topography as the primary drivers of soil moisture distribution

with an increasing influence of precipitation over time. [Conclusion] Soil moisture trends in Ningxia from 2003 to 2022 displayed regional heterogeneity and complexity

and future changes are expected to follow similar patterns. NDVI

topography

and precipitation collectively shaped the soil moisture dynamics. These factors must be integrated into soil resource management strategies to support ecological and water resource optimization in the region.

关键词

Keywords

references

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