CAJ | 학술논문

石漠化敏感性评价是为了识别容易发生石漠化的区域,以评价石漠化对人类活动的敏感程度.根据石漠化的形成机制,分析石漠化敏感性的区域分异规律,明确石漠化问题可能发生的地区范围与可能程度.在遥感和地理信息系统的支持下,该研究以利用贵州省1:50 000地形图和2000年的TM影像,结合贵州省水文地质图,土壤图,地质地貌图,岩组图,政区图以及其他地理基础信息为数据源,生成了贵州省1962年和2000年石漠化的敏感度数据,确定相应的状态转移矩阵,半应用马尔科夫过程模拟石漠化敏感度的动态演变过程和未来演变趋势.在贵州省各石漠化敏感类型中,只有不敏感类型面积在下降,从1962年占该贵国土面积的61.35%下降为2000年的55.55%,同时各石漠化敏感度类型之间相互转换,面积增加幅度最大的是中度敏感类型.预测表明:在未来几十年中,贵州省不敏感地区面积将呈明显下降趋势,中度敏感类型面积呈明显上升趋势,轻度敏感类型面积变化基本趋于平稳,而高度敏感类型和极敏感类型面积都有小幅度上升,说明贵州省石漠化危险程度在加剧.
석막화민감성평개시위료식별용역발생석막화적구역,이평개석막화대인류활동적민감정도.근거석막화적형성궤제,분석석막화민감성적구역분이규률,명학석막화문제가능발생적지구범위여가능정도.재요감화지리신식계통적지지하,해연구이이용귀주성1:50 000지형도화2000년적TM영상,결합귀주성수문지질도,토양도,지질지모도,암조도,정구도이급기타지리기출신식위수거원,생성료귀주성1962년화2000년석막화적민감도수거,학정상응적상태전이구진,반응용마이과부과정모의석막화민감도적동태연변과정화미래연변추세.재귀주성각석막화민감류형중,지유불민감류형면적재하강,종1962년점해귀국토면적적61.35%하강위2000년적55.55%,동시각석막화민감도류형지간상호전환,면적증가폭도최대적시중도민감류형.예측표명:재미래궤십년중,귀주성불민감지구면적장정명현하강추세,중도민감류형면적정명현상승추세,경도민감류형면적변화기본추우평은,이고도민감류형화겁민감류형면적도유소폭도상승,설명귀주성석막화위험정도재가극.
Sensitivity evaluation of rocky desertification is to recognize the areas prone to be rock-deserted, so as to assess the sensitivity degree of rocky desertification to human activities.To perform the sensitivity evaluation of rocky desertification, we should be on the basis of the mechanism of rocky desertification formation for analyzing its regional distribution difference in the sensitivity and further for finding out the rocky desertification-susceptive areas and their possible degrees.Employing remote sensing and geological TM image in 2000 of Guizhou Province, together with the hydrologic map, soil map, geologic map, rock formation map, administrative map and other geological information as data sources to generate the degree data of rocky desertification sensitivity of Guizhou Province in 1962 and 2000, based on which we determined the corresponding degree transfer matrix and adopted Markov model to simulate the dynamic change process of rocky desertification sensitivity and its future evolution trend.In various sensitivity types of rocky desertification in Guizhou Province, only the insensitive type showed a declined acreage, from the proportion of total land acreage of 61.35% in 1962 to 55.55% in 2000.Various sensitivity types inter-conversed, resultantly the acreage of mildly sensitive type increased most.The prediction results showed that the acreage of insensitive type of rocky desertification in Guizhou Province will assume a remarkable decline trend, of mildly sensitive type will present a remarkably increasing trend and of slightly sensitive type basically will maintain a stable level in the future tens of years.Acreages of both highly sensitive and extremely sensitive type of rocky desertification expanded to some extent, suggesting that the rocky desertification risk in Guizhou Province is in an aggravating process.