CAJ | 학술논문

山区平原过渡地带因其地质、地貌的特殊性而担负着自然地域界面的作用，并表现出更高的生态环境脆弱性，研究其脆弱性变化对山区平原生态安全预警非常重要。特别是从土地利用方式改变评价其生态脆弱性，对于土地利用方式调整和规划具有重要指导意义。本文以地处山区平原过渡区的辉南县为例，在分析其土地利用变化基础上，参照生态价值评估体系并结合周围生态环境敏感因子，建立生态脆弱性综合评价指标，对研究区1986年以来环境脆弱性的时空变化进行评价和分析。评价结果如下：（1）从不同用地类型看，生态综合指数大小顺序依次为林地、草地、水域、未利用地，其次是耕地和建设用地。（2）脆弱性时间变化特征：由于土地利用变化，特别是林地减少和耕地、建设用地增加，导致生态贡献指数、生态稳定性指数和生态综合指数显著下降，分别由1986年的2.999、3.324和6.322减小为2006年的2.828、3.032和5.861。（3）空间变化特征：全区范围内生态环境综合指数下降显著，表现为低值区域范围扩大，高值区域范围明显减小。高值区范围由1986年的33217.95ha缩小为2006年的1283.40ha，而低值区的范围则由1986年的86550.87ha扩大为2006年的98084.83 ha。（4）地区差异性：虽然三个生态指数在整体上呈现下降，但是不同子流域其变化表现出显著的差异性，总体上呈现东南山区减小，而西北平原区呈现不明显的增加特点。本文研究结果表明，导致研究区生态脆弱性的主要原因为林地减少和耕地增加。从保护生态环境角度，控制耕地增加和林地减少是有效防范措施。
산구평원과도지대인기지질、지모적특수성이담부착자연지역계면적작용，병표현출경고적생태배경취약성，연구기취약성변화대산구평원생태안전예경비상중요。특별시종토지이용방식개변평개기생태취약성，대우토지이용방식조정화규화구유중요지도의의。본문이지처산구평원과도구적휘남현위례，재분석기토지이용변화기출상，삼조생태개치평고체계병결합주위생태배경민감인자，건립생태취약성종합평개지표，대연구구1986년이래배경취약성적시공변화진행평개화분석。평개결과여하：（1）종불동용지류형간，생태종합지수대소순서의차위임지、초지、수역、미이용지，기차시경지화건설용지。（2）취약성시간변화특정：유우토지이용변화，특별시임지감소화경지、건설용지증가，도치생태공헌지수、생태은정성지수화생태종합지수현저하강，분별유1986년적2.999、3.324화6.322감소위2006년적2.828、3.032화5.861。（3）공간변화특정：전구범위내생태배경종합지수하강현저，표현위저치구역범위확대，고치구역범위명현감소。고치구범위유1986년적33217.95ha축소위2006년적1283.40ha，이저치구적범위칙유1986년적86550.87ha확대위2006년적98084.83 ha。（4）지구차이성：수연삼개생태지수재정체상정현하강，단시불동자류역기변화표현출현저적차이성，총체상정현동남산구감소，이서북평원구정현불명현적증가특점。본문연구결과표명，도치연구구생태취약성적주요원인위임지감소화경지증가。종보호생태배경각도，공제경지증가화임지감소시유효방범조시。
The ecological environments in mountain plain transi-tion zones appear more vulnerable considering the transitional geology and geomorphology conditions. It is vital to study the eco-vulnerability of this special zone for the whole zone's ecologi-cal safety. Especially from land use to understand the eco-vulner-ability, it is feasible to plan land use and land cover in order to protect the eco-environments. The Huinan County which locates in this zone is taken as study area, based on the analysis of land-use changes, the spatial-temporal characteristics on ecological vulnerability are assessed by using ecological synthetical index which is built according to the evaluation system of ecological value and sensitive factors. The results show that:1) According to the types of land-use, the order of ecological synthetical index is forest land, grass land, water body, unused land, cultivated land and construction land. 2) During the past 20 years, because of the great change of land cover, especially the decreased forest and the increased cultivated land & construction land the value of land use contribution index, land use stability index and ecological synthetical index decreased markedly, from 2.999,3.324 and 6.322 to 2.828,3.032 and 5.861 respectively. 3) The spatial characteris-tics on ecological vulnerability change markedly, the mild vulnera-bility area increase while the severe vulnerability area decrease obviously, detailed description listed as follows: the mild vulnera-bility area increases from 86550.87 to 98084.83 and the severe vulnerability area decreases from 33217.95 to1283.40 during the past 20 years. 4)all the three ecological indexes of the whole study area decrease. However, great different changes vary obviously in different catchments, which decrease in the southeast region while increase in the northwest ones obviously. From the results we are told that forest land decrease and arable land increase are the main reasons which cause the eco -vulnerability. Reasonable measures for land use plan could be taken to control the land use changes.