CAJ | 학술논문

以西北干旱典型分布区-甘肃省民勤县为例，采用2000年和2010年两期Landsat TM遥感影像，应用决策树分类法进行土地利用/土地覆盖类型划分，特别细分了未利用地类型。在此基础上，从各种土地利用/土地覆盖类型的面积变化、土地利用/土地覆盖类型间的转移以及土地利用动态度等角度分析西北干旱区土地利用/土地覆盖类型的变化规律。结果表明：实验区土地利用/土地覆盖类型以未利用地占研究区的面积最大，而未利用地中又以戈壁、流动沙地、风蚀劣地三者为主；10 a间，土地利用动态度变化明显，林地、草地面积大幅减少，耕地面积增加，耕地增加面积主要来源于林地、草地转换，说明这期间，人类毁林、垦植现象明显，生态环境有所恶化；未利用地中盐碱地面积减少，流动沙地、干沟面积增大，风蚀劣地面积变化不大，盐碱地部分转化草地，干沟与流动沙地由风蚀劣地部分转化得来，草地、耕地部分转化成风蚀劣地，流动沙地与风蚀劣地之间相互转化，这些变化既有人为因素的影响，也有自然因素的影响，说明人类活动及自然因素同时影响着研究区内未利用地类型的变化。
이서북간한전형분포구-감숙성민근현위례，채용2000년화2010년량기Landsat TM요감영상，응용결책수분류법진행토지이용/토지복개류형화분，특별세분료미이용지류형。재차기출상，종각충토지이용/토지복개류형적면적변화、토지이용/토지복개류형간적전이이급토지이용동태도등각도분석서북간한구토지이용/토지복개류형적변화규률。결과표명：실험구토지이용/토지복개류형이미이용지점연구구적면적최대，이미이용지중우이과벽、류동사지、풍식렬지삼자위주；10 a간，토지이용동태도변화명현，임지、초지면적대폭감소，경지면적증가，경지증가면적주요래원우임지、초지전환，설명저기간，인류훼림、은식현상명현，생태배경유소악화；미이용지중염감지면적감소，류동사지、간구면적증대，풍식렬지면적변화불대，염감지부분전화초지，간구여류동사지유풍식렬지부분전화득래，초지、경지부분전화성풍식렬지，류동사지여풍식렬지지간상호전화，저사변화기유인위인소적영향，야유자연인소적영향，설명인류활동급자연인소동시영향착연구구내미이용지류형적변화。
With the data obtained from two composite Landsat5 TM images of 2000 and 2010 in a typical arid region of Minqin County, Gansu Province, we classified the arid land, especially unused land by using the decision tree classification meth-od, and explored the changes of land use, land cover type area, change degree and transition.The unused land takes up the largest area in Minqin County, mainly containing gobi, desert and Aeolian barren lands.Land use dynamic changed dramatically in ten years, while forestland and glassland area decreased, cropland area increased, and the increased crop-land area mainly came from forestland and grassland, which indicated that deforestation and reclamation were distinct dur-ing the study period, and the ecological environment became worse.In unused land, saline alkali land area decreased, and the mobile sand land and hondo area increased.Aeolian barren land area changed little.Part of saline alkali area con-verted to grassland, the mobile sand land and hondo were converted from aeolian barren land, which were converted from glassland and cropland.There was also mutual transformation between mobile sand land and aeolian barren land.The un-used land use changes were simultaneously influenced by artificial factors and natural factors.