Improving regional soil water-salt management by modeling soil freezing-thawing processes in a cold-arid irrigation district, upper Yellow River basin

IF 4.7 2区地球科学 Q1 WATER RESOURCES

Journal of Hydrology-Regional Studies Pub Date : 2025-06-20 DOI:10.1016/j.ejrh.2025.102544

Lvyang Xiong , Yao Jiang , Junyu Qi , Guanhua Huang

{"title":"Improving regional soil water-salt management by modeling soil freezing-thawing processes in a cold-arid irrigation district, upper Yellow River basin","authors":"Lvyang Xiong , Yao Jiang , Junyu Qi , Guanhua Huang","doi":"10.1016/j.ejrh.2025.102544","DOIUrl":null,"url":null,"abstract":"<div><h3>Study region</h3><div>The Hetao Irrigation District (Hetao), a super-large cold-arid irrigation district located in the upper Yellow River basin, China.</div></div><div><h3>Study focus</h3><div>For cold-arid irrigation districts, understanding soil freezing-thawing processes is important for the reasonable management of non-growing season irrigation to improve soil water-salt conditions. This study aims to conduct regional agro-hydrological modeling with considering soil freezing-thawing processes in Hetao. The SWAT-AG model was adopted and enhanced by introducing a physically-based soil temperature module. Using the enhanced SWAT-AG, the agro-hydrological processes in Hetao were simulated and predicted under both the current autumn irrigation scheme (CAIS) and some water-saving autumn irrigation scenarios (WAIS).</div></div><div><h3>New hydrological insights for the region</h3><div>The results proved that the enhanced SWAT-AG model effectively described the agro-hydrological processes during the soil freezing-thawing period. The simulated results of CAIS indicated that autumn irrigation was efficient in replenishing soil water and controlling soil salinity. The predictions from WAIS indicated that soil water content decreased, soil salt content increased, and groundwater depth became deeper compared to those under CAIS. A 20 % reduction in the current autumn irrigation amount did not compromise the effectiveness of autumn irrigation on soil water-salt and groundwater conditions, making it an appropriate autumn irrigation scheme for achieving both soil water-salt management and water saving in Hetao.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"60 ","pages":"Article 102544"},"PeriodicalIF":4.7000,"publicationDate":"2025-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Hydrology-Regional Studies","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2214581825003696","RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"WATER RESOURCES","Score":null,"Total":0}

引用次数: 0

Abstract

Study region

The Hetao Irrigation District (Hetao), a super-large cold-arid irrigation district located in the upper Yellow River basin, China.

Study focus

For cold-arid irrigation districts, understanding soil freezing-thawing processes is important for the reasonable management of non-growing season irrigation to improve soil water-salt conditions. This study aims to conduct regional agro-hydrological modeling with considering soil freezing-thawing processes in Hetao. The SWAT-AG model was adopted and enhanced by introducing a physically-based soil temperature module. Using the enhanced SWAT-AG, the agro-hydrological processes in Hetao were simulated and predicted under both the current autumn irrigation scheme (CAIS) and some water-saving autumn irrigation scenarios (WAIS).

New hydrological insights for the region

The results proved that the enhanced SWAT-AG model effectively described the agro-hydrological processes during the soil freezing-thawing period. The simulated results of CAIS indicated that autumn irrigation was efficient in replenishing soil water and controlling soil salinity. The predictions from WAIS indicated that soil water content decreased, soil salt content increased, and groundwater depth became deeper compared to those under CAIS. A 20 % reduction in the current autumn irrigation amount did not compromise the effectiveness of autumn irrigation on soil water-salt and groundwater conditions, making it an appropriate autumn irrigation scheme for achieving both soil water-salt management and water saving in Hetao.

查看原文本刊更多论文

黄河上游干冷灌区土壤冻融过程模拟改进区域土壤水盐管理

研究区域河套灌区（河套）是位于黄河上游流域的特大型寒旱灌区。研究重点对于寒冷干旱灌区，了解土壤冻融过程对合理管理非生长季灌溉，改善土壤水盐状况具有重要意义。本研究旨在建立考虑河套地区土壤冻融过程的区域农业水文模型。采用SWAT-AG模型，并引入基于物理的土壤温度模块进行增强。利用增进型SWAT-AG对河套地区现行秋灌方案（CAIS）和节水秋灌方案（WAIS）下的农业水文过程进行了模拟和预测。结果表明，改进的SWAT-AG模型有效地描述了土壤冻融期的农业水文过程。CAIS的模拟结果表明，秋季灌溉在补充土壤水分和控制土壤盐分方面是有效的。与CAIS相比，WAIS预测的土壤含水量降低，土壤含盐量增加，地下水深度加深。当前秋灌水量减少20% %，不影响秋灌对土壤水盐和地下水条件的影响，是河套实现土壤水盐治理和节水的适宜秋灌方案。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Journal of Hydrology-Regional Studies Earth and Planetary Sciences-Earth and Planetary Sciences (miscellaneous)

CiteScore

6.70

自引率

8.50%

发文量

284

审稿时长

60 days

期刊介绍： Journal of Hydrology: Regional Studies publishes original research papers enhancing the science of hydrology and aiming at region-specific problems, past and future conditions, analysis, review and solutions. The journal particularly welcomes research papers that deliver new insights into region-specific hydrological processes and responses to changing conditions, as well as contributions that incorporate interdisciplinarity and translational science.