Evaluation of Ecological Sensitivity and Its Topographic Gradient Characteristics in Qinling-Bashan Mountains

ZHANG Jing; QIN Gongwei; SU Xuemng; XU Zengrang; CHENG Shengkui

doi:10.13870/j.cnki.stbcxb.2024.05.026

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Evaluation of Ecological Sensitivity and Its Topographic Gradient Characteristics in Qinling-Bashan Mountains

更新时间：2025-02-18

- Evaluation of Ecological Sensitivity and Its Topographic Gradient Characteristics in Qinling-Bashan Mountains
- Vol. 38, Issue 5, Pages: 332-342(2024)
- 作者机构：
  
  1. 陕西理工大学人文学院,陕西,汉中,723001
  2. 陕西理工大学生物科学与工程学院,陕西,汉中,723001
  3. 中国科学院地理科学与资源研究所,北京,100101
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2024.05.026
  CLC： Q148;X171.1
- Published：2024
- 稿件说明：
移动端阅览
ZHANG Jing, QIN Gongwei, SU Xuemng, et al. Evaluation of Ecological Sensitivity and Its Topographic Gradient Characteristics in Qinling-Bashan Mountains[J]. 2024, 38(5): 332-342.
DOI：

ZHANG Jing, QIN Gongwei, SU Xuemng, et al. Evaluation of Ecological Sensitivity and Its Topographic Gradient Characteristics in Qinling-Bashan Mountains[J]. 2024, 38(5): 332-342. DOI： 10.13870/j.cnki.stbcxb.2024.05.026.

摘要

[目的] 秦巴山片区不仅是我国重要的生态功能区

也是国家集中连片特困区

加强生态敏感性评价

揭示其地形梯度特征

对于山区生态红线划定和生态高地建设具有重要价值。[方法] 借助GIS技术

以土地利用/覆被、气候、地形和土壤等数据为基础

综合采用线性加权求和法、熵权法、空间叠置法等

评价区域生态敏感性

并进行敏感性功能区划。[结果] (1)2000—2018年秦巴山片区生态敏感性呈现波动性变化

2010年以后生态敏感性有所降低;(2)水平方向上呈现南高北低的格局

巴山山区县生态敏感性高于秦岭山区县;(3)垂直方向上

随着地形的增加

生态敏感性呈现"先增加后降低再增加"的态势;在海拔900 m附近最高;重度以上生态敏感性在地表切割深度75~200 m和坡度15°~25°分布面积最广;(4)基于生态敏感性评价结果

将秦巴山片区分为重点建设区、适度开发区、水土保持区、一般生态区和重要生态功能区

归纳各功能区土地利用和生态敏感性特征

并提出生态保护对策。[结论] 未来要持续优化土地利用格局

加强坡度15°以上和中低地形位区域的山水林湖田草综合整治与生态修复。

Abstract

[Objective] Qinling-Bashan mountains are not only an important ecological function area

but also a concentrated contiguous poverty-stricken area in China. It is of great practical significance to strengthen the ecological sensitivity evaluation and reveal the terrain gradient characteristics for the delineation of ecological red line and the construction of regional ecological highlands in the mountainous area. [Methods] Based on the data of land use / cover

climate

terrain and soil type

the linear weighted sum method

entropy weight method and spatial overlay analysis method have been used to evaluate its ecological sensitivity

and the sensitive function zoning and ecological protection countermeasures have been put forward. [Results] (1)The ecological sensitivity fluctuated in Qinling-Bashan mountains during 2000—2018 and it decreased after 2010;(2) Horizontally

the ecological sensitivity of Bashan mountains is higher than that of Qinling mountains;(3) Vertically

with the increase of terrain

it shows the trend of"first increasing-decreasing-then increasing".The ecological sensitivity is the highest around 900 m of elevation

and the distribution area of ecological sensitivity above severe degree is the most extensive in 75 ~ 200 m of surface cutting depth and 15° ~ 25° of slope.(4) According to the evaluation results

it is divided into five types: key construction area

moderate development area

soil-and-water conservation area

general ecological area and important ecological area

and their characteristics and protection countermeasures have been summed up and put forward. [Conclusion] In the future

we should continually optimize the land use pattern

strengthen the comprehensive management and ecological restoration of mountains

forest

farmlands

lakes and grasslands.

关键词

Keywords

references

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