Jialin et al. (2025) Spatiotemporal dynamics of meteorological and soil droughts and their effects on water use efficiency in the Ningxia-Inner Mongolia Irrigation District

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Identification

• Journal: SHILAP Revista de lepidopterología
• Year: 2025
• Date: 2025-12-01
• Authors: Qian Jialin, FENG Xiong, BU Lingxin, ZHANG Shutong, FENG Kepeng
• DOI: 10.13522/j.cnki.ggps.2025184

Research Groups

Not explicitly mentioned in the provided text.

Short Summary

This study analyzed the spatiotemporal dynamics of meteorological and soil drought and their effects on water use efficiency (WUE) in the Ningxia-Inner Mongolia Irrigation District, finding that meteorological drought is the dominant factor influencing WUE, with significant lagged effects.

Objective

• To analyze the spatiotemporal dynamics of meteorological and soil drought and their effects on water use efficiency (WUE) in the Ningxia-Inner Mongolia Irrigation District.

Study Configuration

• Spatial Scale: Ningxia-Inner Mongolia Irrigation District, Northern China.
• Temporal Scale: 1989 to 2018 (30 years).

Methodology and Data

• Models used: Global Land Evaporation Amsterdam Model v3.5 (GLEAM v3.5), Standardized Precipitation Evapotranspiration Index (SPEI), Soil Moisture Anomaly Index (SMAI).
• Data sources: Long-term in-situ experimental data, Global Land Surface Satellite (GLASS) data, standardized precipitation evapotranspiration index-grid data.

Main Results

• Monthly drought showed significant fluctuation, while quarterly drought was smoother; annual meteorological drought exhibited a decreasing trend. SMAI fluctuated notably but showed an increasing trend.
• Spatially, mean WUE was high in the central area and low at the edges of the district. Mean Gross Primary Production (GPP) and Evapotranspiration (ET) were higher in the Ningxia section, with GPP increasing faster than ET, leading to a significant increase in mean WUE in Ningxia.
• Annual SPEI was negatively correlated with WUE, while annual SMAI was positively correlated with WUE (both significant). Monthly SPEI showed complex correlations with WUE: positive in May, negative in July and September (all significant).
• WUE responded strongly to monthly SPEI with a 7-month lag, and weakly to SMAI with 5- and 7-month lags. In the Inner Mongolia section, the negative response of WUE to monthly SPEI could lag by over 12 months.
• Meteorological drought was identified as having a more pronounced impact on WUE than soil drought.

Contributions

• Provides a comprehensive analysis of the spatiotemporal dynamics of meteorological and soil drought and their lagged effects on water use efficiency in a critical irrigation district in Northern China.
• Identifies meteorological drought as the dominant factor influencing WUE, highlighting the importance of its lagged effects for developing drought-resistance strategies and improving water management.

Funding

Not specified in the provided text.

Citation

@article{Jialin2025Spatiotemporal,
  author = {Jialin, Qian and Xiong, FENG and Lingxin, BU and Shutong, ZHANG and Kepeng, FENG},
  title = {Spatiotemporal dynamics of meteorological and soil droughts and their effects on water use efficiency in the Ningxia-Inner Mongolia Irrigation District},
  journal = {SHILAP Revista de lepidopterología},
  year = {2025},
  doi = {10.13522/j.cnki.ggps.2025184},
  url = {https://doi.org/10.13522/j.cnki.ggps.2025184}
}