Risk Assessment of Landscape Ecology and Its Control Strategy Based on Life Community:A Case Study of Chengdu-Chongqing Urban Agglomeration
Received date: 2020-10-21
Revised date: 2021-03-10
Online published: 2025-04-13
Research on risk assessment of landscape ecology and its management strategy based on the concept of "life community" is the key measure to promote the high-quality economic-green development of urban agglomeration. Under the guidance of this concept,the risk assessment system of landscape ecology in urban agglomerations was constructed from five dimensions of "terrain landform-water body environment-soil environment-human activities-landscape structure",so that the health status of the life community could be diagnosed in Chengdu-Chongqing Urban Agglomeration. Based on this,the optimization network of landscape pattern in the region was constructed by further coupling the circuit theory and the landscape ecological security pattern. Results showed that the mean value of the habitat quality index was 0.94,and the landscape ecological risk of 66.85% region was in the middle and low level. The overall ecological environment was not bad,but there was also the interlacing phenomenon of high and low risk region. The identified ecological source area was 111 461.62 km2,accounting for 46.54% of the total area. It was divided into ecological blocking zone,ecological transition zone and ecological buffer zone,which accounted for 25.61%,14.65% and 13.20% of the all regions respectively. The "76+8" corridor system, 5 046.19 km long, included 316 key ecological nodes. An ecological network system for landscape ecological risk control was built to maintain the healthy development of the ecosystem in Chengdu-Chongqing Urban Agglomeration. The ecological network system for landscape ecological risk control was built to maintain the healthy and sustainable development of the ecosystem in Chengdu-Chongqing Urban Agglomeration. The research results provide theoretical support and methodological guidance for landscape ecological planning in urban agglomeration.
LIANG Fachao , HU Qiyu , QI Xiaoxing . Risk Assessment of Landscape Ecology and Its Control Strategy Based on Life Community:A Case Study of Chengdu-Chongqing Urban Agglomeration[J]. Economic geography, 2021 , 41(8) : 152 -159 . DOI: 10.15957/j.cnki.jjdl.2021.08.018
表1 景观生态风险评价指标体系Tab.1 The index system of landscape |
评价 维度 | 评价 因子 | 因子 权重 | 分级标准 | 分级 赋值 |
---|---|---|---|---|
地 形 山 势 | 坡度(°) | 0.09 | 0~8 | 1 |
8~15 | 3 | |||
15~25 | 5 | |||
25~35 | 7 | |||
>35 | 9 | |||
海拔(m) | 0.03 | <500 | 1 | |
500~1 000 | 3 | |||
1 000~1 500 | 5 | |||
1 500~2 000 | 7 | |||
>2 000 | 9 | |||
河 湖 水 体 | 距河流水系距离(m) 距湖泊水库距离(m) | 0.16 0.16 | <100 | 1 |
100~200 | 3 | |||
200~800 | 5 | |||
800~2 000 | 7 | |||
>2 000 | 9 | |||
土 壤 环 境 | 土壤类型 | 0.03 | 黑黏土(亚高山草甸土) | 1 |
紫色土 | 3 | |||
红壤、赤红壤、南方水稻土 | 5 | |||
黄壤、棕壤、黄棕壤 | 7 | |||
石灰土 | 9 | |||
土壤侵蚀 | 0.09 | 微度、轻度 | 1 | |
中度 | 3 | |||
强烈 | 5 | |||
极强烈 | 7 | |||
剧烈 | 9 | |||
人 类 活 动 | 距城镇建设区距离(m) | 0.03 | >3 000 | 1 |
2 000~3 000 | 3 | |||
1 000~2 000 | 5 | |||
500~1 000 | 7 | |||
<500 | 9 | |||
距农村居民区距离(m) | 0.03 | >2 000 | 1 | |
1 000~2 000 | 3 | |||
500~1 000 | 5 | |||
250~500 | 7 | |||
<250 | 9 | |||
土地利用强度 | 0.16 | 森林 | 1 | |
湿地、水域 | 3 | |||
草地、灌木林地等 | 5 | |||
农田 | 7 | |||
裸地等未利用地、建设用地 | 9 | |||
景 观 结 构 | 景观干扰指数 | 0.22 | <8.35 | 1 |
8.35~13.85 | 3 | |||
13.85~19.14 | 5 | |||
19.14~24.84 | 7 | |||
>24.84 | 9 |
ecological risk assessment |
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