Modelling water and land resources synergy and trade-off in a major grain-producing area, China

IF 6.5 1区农林科学 Q1 AGRONOMY

Agricultural Water Management Pub Date : 2025-10-10 DOI:10.1016/j.agwat.2025.109880

Hao Song , Bo Li , Zhijun Li , Guangxin Zhang , Xixi Lu , Peng Qi

{"title":"Modelling water and land resources synergy and trade-off in a major grain-producing area, China","authors":"Hao Song , Bo Li , Zhijun Li , Guangxin Zhang , Xixi Lu , Peng Qi","doi":"10.1016/j.agwat.2025.109880","DOIUrl":null,"url":null,"abstract":"<div><div>How to coordinate and trade-off limited water and land resources to improve water resource utilization efficiency, increase food production capacity, protect ecosystems and enhance carbon sequestration remains a complex scientific issue. Taking the Sanjiang Plain as a case study area, water resources, crop planting structure and ecosystem distribution under conventional irrigation and water-saving irrigation scenarios are spatially coordinated and optimized through a distributed hydrological model (CWatM) and an improved a multi-objective optimization model with GridLandOpt method. The results showed that: (1) Water resources in the Sanjiang Plain fluctuated between 15.67 and 47.92 billion m<sup>3</sup> during the 2000–2019. (2) Compared with that before optimization, under the conventional irrigation mode, irrigation water use was reduced by 2.3 billion m<sup>3</sup>, total carbon sequestration increased by about 12.53 %, economic benefits decreased by 3.22 %. The planting structure of rice, corn and soybeans needs to be adjusted from the original 3:2:1–2.2:2.4:1.4. Wetland area increased by 2.34 %, ecological benefits increased by 12.53 %, and ecological connectivity improved by 2.79 %. (3) Compared with that before optimization, under the water-saving irrigation mode, irrigation water was reduced by 4.5 billion m<sup>3</sup>, total carbon sequestration increased by about 11.21 %. The planting structure of rice, corn and soybeans needs to be adjusted to 2.3:2.4:1.3. Wetland area increased by 0.81 %, ecological benefits increased by 0.80 %, and ecological connectivity improved by 2.30 %. The research results can provide technical support for the sustainable use of water resources, stable grain production and improvement of ecosystem service functions in China's major grain-producing areas.</div></div>","PeriodicalId":7634,"journal":{"name":"Agricultural Water Management","volume":"320 ","pages":"Article 109880"},"PeriodicalIF":6.5000,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Agricultural Water Management","FirstCategoryId":"97","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0378377425005943","RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"AGRONOMY","Score":null,"Total":0}

引用次数: 0

Abstract

How to coordinate and trade-off limited water and land resources to improve water resource utilization efficiency, increase food production capacity, protect ecosystems and enhance carbon sequestration remains a complex scientific issue. Taking the Sanjiang Plain as a case study area, water resources, crop planting structure and ecosystem distribution under conventional irrigation and water-saving irrigation scenarios are spatially coordinated and optimized through a distributed hydrological model (CWatM) and an improved a multi-objective optimization model with GridLandOpt method. The results showed that: (1) Water resources in the Sanjiang Plain fluctuated between 15.67 and 47.92 billion m³ during the 2000–2019. (2) Compared with that before optimization, under the conventional irrigation mode, irrigation water use was reduced by 2.3 billion m³, total carbon sequestration increased by about 12.53 %, economic benefits decreased by 3.22 %. The planting structure of rice, corn and soybeans needs to be adjusted from the original 3:2:1–2.2:2.4:1.4. Wetland area increased by 2.34 %, ecological benefits increased by 12.53 %, and ecological connectivity improved by 2.79 %. (3) Compared with that before optimization, under the water-saving irrigation mode, irrigation water was reduced by 4.5 billion m³, total carbon sequestration increased by about 11.21 %. The planting structure of rice, corn and soybeans needs to be adjusted to 2.3:2.4:1.3. Wetland area increased by 0.81 %, ecological benefits increased by 0.80 %, and ecological connectivity improved by 2.30 %. The research results can provide technical support for the sustainable use of water resources, stable grain production and improvement of ecosystem service functions in China's major grain-producing areas.

查看原文本刊更多论文

中国粮食主产区水陆资源协同与权衡模型

如何协调和权衡有限的水资源和土地资源，以提高水资源利用效率，增加粮食生产能力，保护生态系统和增强碳固存，仍然是一个复杂的科学问题。以三江平原为例，通过分布式水文模型（CWatM）和改进的GridLandOpt多目标优化模型，对常规灌溉和节水灌溉情景下的水资源、作物种植结构和生态系统分布进行了空间协调优化。结果表明：①2000-2019年，三江平原水资源在156.7 ~ 479.2亿m3之间波动；(2)与优化前相比，常规灌溉方式下灌溉用水量减少23亿m3，固碳总量增加约12.53 %，经济效益下降3.22 %。水稻、玉米、大豆的种植结构需要从原来的3:2:1-2.2:2.4:1.4进行调整。湿地面积增加2.34 %，生态效益增加12.53 %，生态连通性提高2.79 %。(3)与优化前相比，节水灌溉模式下灌溉水减少45亿m3，固碳总量增加约11.21% %。水稻、玉米、大豆种植结构调整为2.3:2.4:1.3。湿地面积增加0.81 %，生态效益增加0.80 %，生态连通性提高2.30 %。研究成果可为中国主产区水资源可持续利用、粮食稳定生产和生态系统服务功能提升提供技术支撑。

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

Agricultural Water Management 农林科学-农艺学

CiteScore

12.10

自引率

14.90%

发文量

648

审稿时长

4.9 months

期刊介绍： Agricultural Water Management publishes papers of international significance relating to the science, economics, and policy of agricultural water management. In all cases, manuscripts must address implications and provide insight regarding agricultural water management.