基于山江海视角与SRP模型的桂西南-北部湾生态环境脆弱性评价

为揭示桂西南喀斯特-北部湾海岸带生态环境脆弱性,本研究基于山江海视角,采用生态敏感度-生态恢复力-生态压力度(SRP)模型、无纲量化模型、层次分析法,结合生态环境脆弱性指数,对该区域进行了生态环境脆弱性的评价,为该区域的生态环境治理和恢复提供科学的理论基础和技术指导.结果表明:(1)2000～2018年三期生态环境脆弱...

Ecological Environment Vulnerability Assessment of Southwest Guangxi-Beibu Gulf Based on the Perspective of Mountains, Rivers and Sea and SRP Model

The ecological environment vulnerability of Southwest Karst-Beibu Gulf coastal Zone of Guangxi was assessed based on a mountains, rivers, and sea perspective, by using the ecological sensitivity-ecological restoration-ecological pressure(SRP)model, a dimensionless quantitative model, analytic hierarchy process, as well as the combination of the ecological environment vulnerability index, the results would provide scientific theoretical basis and technical guidance for the regional ecological environment governance and restoration. It showed that:(1) the ecological environment vulnerability index of the third period from 2000 to 2018 ranged from 0.14 to 0.96, and the average value was 0.52, indicating moderate vulnerability on the whole. In 2000, the proportion of slight vulnerability grade was 44.96%, followed by moderate vulnerability grade, and the area of severe vulnerability grade was the smallest. In 2010, the proportions of sligh vulnerability and moderate vulnerability were similar, and the areas of potential vulnerability and severe vulnerability were reduced. In 2018, the proportion of mildly vulnerable areas was still the largest, and the area of severely vulnerable areas increased by 1 736 km². (2) With the increase of elevation, the degree of ecological environment vulnerability tends to decrease on the whole, and the proportion of severe vulnerability becomes smaller and smaller. (3) Forestland is mainly distributed in micro-fragile areas and mildly fragile areas; arable land, water area and construction land are mainly slightly fragile; grassland is mainly in micro-fragile and mildly fragile.