资源科学 ›› 2018, Vol. 40 ›› Issue (10): 2073-2084.doi: 10.18402/resci.2018.10.15

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基于生态风险空间差异的土地整治投入优先序研究

程文仕(), 姚尧, 黄鑫, 焦云腾   

  1. 甘肃农业大学管理学院,兰州 730070
  • 收稿日期:2017-04-26 修回日期:2018-04-02 出版日期:2018-10-25 发布日期:2018-10-20
  • 作者简介:

    作者简介:程文仕,男,陕西南郑人,副教授,主要研究方向为土地调查与评价、土地利用与规划、土地整治工程。E-mail: tgchwsh@163.com

  • 基金资助:
    甘肃农业大学科技创新基金—学科建设基金资助(GSAU-XKJS-2018-090);国家社科基金西部项目(10XJY031)

Priority of land remediation based on spatial differences of the ecological risk

Wenshi CHENG(), Yao YAO, Xin HUANG, Yunteng JIAO   

  1. College of Management, Gansu Agricultural University, Lanzhou 730070, China
  • Received:2017-04-26 Revised:2018-04-02 Online:2018-10-25 Published:2018-10-20

摘要:

近年来,中国各地投入了大量资金实施土地整治项目,取得了显著成效,但在安排项目及其资金投入的先后顺序方面,缺乏科学的依据和标准,已成为土地整治中亟待解决的问题。本文以甘肃省华池县为例,在“十三五”土地整治规划(2016—2020年)确定的整治潜力的基础上,运用相对风险模型(RRM模型),对华池县15个乡镇的生态风险空间差异进行评价,确定土地整治投入优先序。结果显示:①华池县土地整治生态风险划分为低风险区、中风险区、较高风险区、高风险区4个等级;②土地整治投入优先序划分为整治优先投入区、一般投入区、投入紧缩区、限制投入区,并从管控风险的角度提出各区域未来土地整治的重点方向和注意问题。研究表明:运用相对风险模型(RRM模型)评价生态风险更符合土地整治工程建设实际,在此基础上确定的土地整治优先序符合西部生态环境脆弱区实际情况,在确定土地整治资金投入顺序中是一种较好的方法。

关键词: 土地整治, 生态风险, 相对风险模型(RRM), 投入顺序, 华池县

Abstract:

For the past few years, a large amount of capital has been invested in land remediation projects across China and these have achieved remarkable results. However, urgent problems exist in land remediation projects affecting project arrangement and capital investment due to a lack of a scientific basis and standards. Here, we evaluated spatial differences in ecological risk and confirmed the priority for land remediation in 15 townships in Huachi county using the relative risk model (RRM) based on remediation potential derived from The 13th Five-year Land Remediation Plan. The results show that the ecological risk of land remediation can be divided into four grades: low risk zone, middle risk zone, higher risk zone and highest risk zone. The priority for land remediation investment should be priority input areas followed by general input areas, tightening areas and restricted areas. We put forward a prospective key direction and issues affecting land remediation from the point of view of risk management and control. Ecological risk evaluated by a RRM is more in line with the actual construction of land remediation projects, and land remediation priorities are in line with the western ecological environment fragile zone. The RRM is an ideal way to determine the arrangement of land remediation and capital investment.

Key words: land remediation, ecological risk assessment, relative risk model (RRM), risk management, Huachi County