鄂托克旗風(fēng)蝕荒漠化景觀格局動(dòng)態(tài)變化研究

摘要： 利用鄂托克旗2000年和2005年TM遙感影像,對(duì)荒漠化土地進(jìn)行判讀,結(jié)合實(shí)地調(diào)查,并根據(jù)中國"三北"地區(qū)荒漠化區(qū)域分類與發(fā)展趨勢(shì)綜合研究野外地質(zhì)調(diào)查內(nèi)容-技術(shù)要求,確定土地荒漠化景觀類型和荒漠化程度,將研究區(qū)風(fēng)蝕荒漠化分為輕度沙化、中度沙化、重度風(fēng)蝕和嚴(yán)重風(fēng)蝕4個(gè)類型.應(yīng)用Arcview3.3對(duì)兩期TM影像進(jìn)行人機(jī)交互判讀,得到研究區(qū)兩個(gè)時(shí)期的風(fēng)蝕荒漠化景觀類型數(shù)據(jù)并統(tǒng)計(jì),分析研究區(qū)風(fēng)蝕荒漠化景觀格局的動(dòng)態(tài)變化.結(jié)果表明,未荒漠化土地主要集中在研究區(qū)的北部,嚴(yán)重風(fēng)蝕主要集中在研究區(qū)的南部,由北向南,風(fēng)蝕程度逐漸加重.研究區(qū)風(fēng)蝕荒漠化主要以輕度沙化和中度沙化為主,占研究區(qū)風(fēng)蝕面積的70%以上,破碎度有所增大.風(fēng)蝕荒漠化面積雖有減小,但風(fēng)蝕呈加劇趨勢(shì).鹽漬化土地已轉(zhuǎn)化為風(fēng)蝕荒漠化景觀,而風(fēng)蝕荒漠化景觀可以向其他各景觀轉(zhuǎn)化.在適當(dāng)條件下,輕度沙化土地與未荒漠化土地容易相互轉(zhuǎn)化.中度沙化土地和重度風(fēng)蝕土地容易轉(zhuǎn)變?yōu)槠渌�景觀. Abstract： The TM remote sensing images of Otog Banner in 2000 and 2005 were interpreted to abstract the desertification lands. The results combined with the field survey were used to determine the types and degrees of desertification lands according to the requirements of content-technology in the desertification regionalization of China "three-north" regions. The aeolian lands in study region can be classified as four types: slight desertification, moderate desertification, severe desertification, and very severe desertification. The statistical data on landscape patterns of the study region in two periods were obtained through human-computer interaction interpretation with Arcview3.3 software. Then the dynamic changes of aeolian landscape patterns were analyzed. The results showed that not desertification lands mainly distributed in the north and very severe desertification lands in the south of Otog Banner, with the wind erosion degree increasing from north to south. The area of desertification lands in the study region had decreased, but the wind erosion degree of land increased, and the desertification area of both slight desertification and moderate desertification occupied more than 70% of the erosion area. The former salinized lands had been transformed into aeolian desertification lands. Generally, under proper conditions transformation usually occurred between the slight desertification and non desertification lands, and the middle and the severe types are inclined to the other landscapees. 作 者： 朱麗    李金霞    秦富倉    姚云峰    Zhuli    LI Jin-xia    QIN Fu-cang    YAO Yun-feng   作者單位： 朱麗,Zhuli(包頭師范學(xué)院,資源與環(huán)境學(xué)院,內(nèi)蒙古,包頭,014030;內(nèi)蒙古農(nóng)業(yè)大學(xué),生態(tài)環(huán)境學(xué)院,內(nèi)蒙古,呼和浩特,010019)

李金霞,LI Jin-xia(包頭師范學(xué)院,資源與環(huán)境學(xué)院,內(nèi)蒙古,包頭,014030)

秦富倉,姚云峰,QIN Fu-cang,YAO Yun-feng(內(nèi)蒙古農(nóng)業(yè)大學(xué),生態(tài)環(huán)境學(xué)院,內(nèi)蒙古,呼和浩特,010019) 

期 刊： 中國沙漠  ISTICPKU   Journal： JOURNAL OF DESERT RESEARCH  年，卷(期)： 2009, 29(6)  分類號(hào)： X144  關(guān)鍵詞： 風(fēng)蝕荒漠化    景觀格局    鄂托克旗    動(dòng)態(tài)    Keywords： blow desertification    landscape pattern    dynamic change    Etuoke county   

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