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干旱区地理 ›› 2024, Vol. 47 ›› Issue (1): 58-67.doi: 10.12118/j.issn.1000-6060.2023.333

• 地表过程研究 • 上一篇    下一篇

基于RWEQ模型的疏勒河流域防风固沙功能价值评估

蔺阿荣1(),周冬梅2,马静2,朱小燕2,江晶1,张军2,3()   

  1. 1.甘肃农业大学管理学院,甘肃 兰州 730070
    2.甘肃农业大学资源与环境学院,甘肃 兰州 730070
    3.甘肃省节水农业工程技术研究中心,甘肃 兰州 730070
  • 收稿日期:2023-07-02 修回日期:2023-09-13 出版日期:2024-01-25 发布日期:2024-01-26
  • 通讯作者: 张军(1977-),男,博士,教授,主要从事生态系统服务和土地资源管理等方面的研究. E-mail: zhangjun@gsau.edu.cn
  • 作者简介:蔺阿荣(1999-),女,硕士研究生,主要从事生态系统服务方面的研究. E-mail: linarong2023@163.com
  • 基金资助:
    甘肃省科技厅重点研发计划-农业领域(23YFNA0036);甘肃省自然科学基金项目(21JR7RA811);甘肃省林业和草原科技创新计划(LCKJCX202205);国家重点研发项目课题(2022YFD1900203)

Evaluation of wind prevention and sand fixation function in Shule River Basin based on RWEQ model

LIN Arong1(),ZHOU Dongmei2,MA Jing2,ZHU Xiaoyan2,JIANG Jing1,ZHANG Jun2,3()   

  1. 1. College of Management, Gansu Agricultural University, Lanzhou 730070, Gansu, China
    2. College of Resources and Environmental Science, Gansu Agricultural University, Lanzhou 730070, Gansu, China
    3. Research Center for Water Saving Agriculture in Gansu Province, Lanzhou 730070, Gansu, China
  • Received:2023-07-02 Revised:2023-09-13 Online:2024-01-25 Published:2024-01-26

摘要:

疏勒河流域地处西北内陆,是“一带一路”的关键节点。近年来随着全球变化与经济社会活动强度增加,导致建设用地快速扩张、土地沙化等问题,影响区域生态与经济社会的可持续发展。疏勒河流域处于北方防沙带中心,开展其防风固沙价值评估对于构建区域生态安全格局和保障流域可持续发展具有重要生态意义。基于修正风蚀方程模型(RWEQ)对2008—2018年疏勒河流域防风固沙功能及其价值进行评估。结果表明:(1) 2008—2018年疏勒河流域防风固沙总量为43.927×104~129.530×104 t·km-2,防风固沙量呈上升趋势。(2) 2008—2018年疏勒河流域防风固沙价值快速增加,其多年平均价值占比由高到低依次为减少土地损失价值(99.46%)、保持土壤肥力价值(0.47%)、保持土壤有机质价值(0.04%)、减少交通运输经济损失价值(0.03%)。(3) 流域防风固沙功能与土地利用密切相关,防风固沙能力较强的区域主要分布在草地、耕地等植被覆盖率较高区域;低值区主要分布在流域土地利用类型为未利用地区域。(4) 相较社会因素,自然指标因子对流域防风固沙功能价值影响更大。研究结果可为确定流域生态补偿主客体及补偿标准提供依据。

关键词: 防风固沙服务, 修正的土壤风蚀方程(RWEQ), 价值评估, 疏勒河流域

Abstract:

The Shule River Basin is located in the northwest inland region of China and is a key node of the Belt and Road Initiative. In recent years, with the increasing intensity of global changes and economic and social activities, problems, such as the rapid expansion of construction land and desertification have affected the sustainable development of regional ecology and economic society. The Shule River Basin is located at the center of the northern sand prevention belt of China, and an evaluation of its wind prevention and sand fixation value is of great ecological significance for building a regional ecological security pattern and ensuring sustainable development of the basin. On the basis of the revised wind erosion equation model, the value of wind prevention and sand fixation in the Shule River Basin from 2008 to 2018 was evaluated. The results are as follows: (1) The total amount of wind prevention and sand fixation in the Shule River Basin from 2008 to 2018 was 43.927×104 to 129.530×104 t·km−2, with an increasing trend in wind prevention and sand fixation capacity. (2) The value of wind prevention and sand fixation in the Shule River Basin rapidly increased from 2008 to 2018, with an annual average value ranging from high to low to reduce the value of land loss (99.46%), maintain the value of soil fertility (0.47%), maintain the value of soil organic matter (0.04%), and reduce the value of economic loss of transportation (0.03%). (3) The function of wind prevention and sand fixation in river basins is closely related to land use. Among them, the areas with stronger windproof and sand-fixing capability are primarily distributed in grassland, cropland, and other areas with higher vegetation cover; the low-value areas are primarily distributed in unused land of the land use type of the river basin. (4) Natural indicator factors have a greater impact on the value of wind and sand fixation functions in river basins than social factors. These findings can provide a basis for determining the subject and object of ecological compensation and compensation standards in the Shule River Basin.

Key words: wind prevention and sand fixation services, revised wind erosion equation (RWEQ), value evaluation, Shule River Basin