Spatial and temporal heterogeneity of soil salinity and ionic coupling relationship under the water-saving renovation of a typical irrigation district in arid and semi-arid areas
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View abstract on PubMed
Summary
This summary is machine-generated.Water-saving renovations in irrigation areas reduce soil salinity, improving soil quality. Ordinary Kriging interpolation accurately maps soil salinity distribution, showing significant desalination rates and enhanced ion coupling after project implementation.
Area Of Science
- Environmental Science
- Soil Science
- Agricultural Engineering
Background
- Soil salinization is a critical global environmental issue impacting agricultural productivity.
- Water-saving renovation projects are increasingly implemented in irrigation areas to combat salinization.
- Understanding the spatiotemporal dynamics of soil salinity and ion coupling is crucial for effective management.
Purpose Of The Study
- To investigate the spatiotemporal heterogeneity of soil salinity under water-saving renovation.
- To analyze the coupling relationship of soil salinity ions during different water-saving periods.
- To evaluate the effectiveness of water-saving renovation projects on soil quality in the Shenwu Irrigation Area.
Main Methods
- Conducted field experiments with 46 soil sampling points in the Shenwu Irrigation Area (2015-2022).
- Applied spatial interpolation methods (Ordinary Kriging, IDW, RBF, Universal Kriging) to analyze soil salinity distribution.
- Utilized coupling coordination models to assess soil salt-based ion relationships and changes over time.
Main Results
- Ordinary Kriging interpolation demonstrated superior accuracy in mapping soil salinity compared to other methods.
- Water-saving renovations led to increased soil salinity variability but significant desalination rates (5.71% during, 35.67% after project).
- The project positively impacted ion coupling degree (17.07% growth) and coordination degree (10.81% growth), improving overall soil quality.
Conclusions
- Water-saving renovation projects effectively mitigate soil salinization and enhance soil quality in irrigation areas.
- Ordinary Kriging is an optimal method for accurate soil salinity mapping in such environments.
- The study provides critical data for informed soil salinization management and prevention strategies.
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