干旱区生态环境知识资源中心(Arid): 内蒙古十大孔兑流域地貌演化格局及其成因机制

Arid

	内蒙古十大孔兑流域地貌演化格局及其成因机制
其他题名	Landform evolution pattern of the ten Kongdui basins and its genetic mechanisms in Inner Mongolia of China
	顾畛逵; 师长兴; 阳辉; 刘晓菲
来源期刊	干旱区地理
ISSN	1000-6060
出版年	2017
卷号	40 期号:6 页码:1188-1197
中文摘要	地貌演化是地貌学研究的重要内容之一。通过选择若干反映地貌演化特征综合性较强的指标,以30 m分辨率的DEM数据为基础,对内蒙古十大孔兑流域的地貌演化格局进行了研究。在借助灰色GM(1,1)模型对研究区地貌演化特征的空间变化规律进行分析的同时,进一步结合构造活动、岩性特征及气候演变对孔兑流域地貌景观的成因机制及形成效应进行了探讨。结果表明:十大孔兑各流域目前除罕台川为接近壮年期的幼年地貌以及壕庆河为老年期地貌之外尚处于壮年期演化阶段,孔兑流域在未来较长时期内产沙潜力仍然巨大,其入黄泥沙中来自上游砒砂岩区的粗砂及库布齐沙漠沙分别在长短期尺度上扮演着重要角色;孔兑区所受的内外营力对抗作用或侵蚀强度以西部大于东部、中上游区表现突出为特点,其原因主要与西侧地表隆升程度较高有关,而降雨的空间差异对地貌演化效应的影响相对较小;与之相反,主沟纵剖面却以东部流域演化程度较高为特点,这主要与东部地表本身抬升程度低而慢有关,其次与东部降雨量略多以及岩性特征可能也存在一定关系。此外,从地貌景观的西高东低格局的形成时间考虑,其演化和发育时间主要集中在第四纪以来,期间由于气候变化可能经历过若干次慢-快发育的交互变化过程。
英文摘要	Geomorphic evolution is an important part of geomorphology. According to some indices including longitudinal section gradient,area-altitude curve,entropy of erosion basin(H(S)),entropy of longitudinal profile(H(N))and others,this paper studies the evolution of the main channel and basins of the Inner Mongolia based on a 30-m resolution DEM. Firstly,the index values and simulated their spatial variation trends were calculated by Grey model(GM(1,1)),then this paper discussed the formation mechanism of watershed landscape pattern associated with the tectonic activities,lithology characters and the climatic evolution. The results show that the ten Kongdui(seasonal river)basins are mostly in the mature stage of landform evolution except Hantaichuan basin(R5)and Haoqinghe basin(R6)being in the youth and old stages respectively,it means that there will be a high potential of sediment yield for a long time in the future. Sediment carried by the Kong dui is mainly consist of the coarse sands coming from Mesozoic loose sandstone(named asPishain Chinese)area in its upstream and desert sands coming from Kubuqi Desert. The erosion intensity of the west Kongdui basins is higher than that of the east and the main reason is that the uplift of the ground is higher than that of the west side,while the influence of climatic factors is less relatively. In contrast,as a result of the lower tectonic uplift and probably is also related to the slightly more rainfall and lithologic properties in the east basins,the evolution of longitudinal profiles of the main channel of the east area is characterized by a higher degree than the west. The formation of the existing landscape pattern of low in the east and high in the west might mainly occur in the Quaternary, and the landform evolution rate probably altered with climate change at the same time.
中文关键词	十大孔兑 ; 地貌演化 ; GM(1,1)模型 ; 构造活动 ; 岩性 ; 气候效应
英文关键词	geomorphic evolution the ten Kongdui basins GM(1,1) tectonic activity lithologic property climate change
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOSCIENCES MULTIDISCIPLINARY
WOS研究方向	Geology
CSCD记录号	CSCD:6147202
来源机构	中国科学院地理科学与资源研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/235961
作者单位	中国科学院地理科学与资源研究所, 中国科学院陆地水循环及地表过程重点实验室, 北京 100101, 中国
推荐引用方式 GB/T 7714	顾畛逵,师长兴,阳辉,等. 内蒙古十大孔兑流域地貌演化格局及其成因机制[J]. 中国科学院地理科学与资源研究所,2017,40(6):1188-1197.
APA	顾畛逵,师长兴,阳辉,&刘晓菲.(2017).内蒙古十大孔兑流域地貌演化格局及其成因机制.干旱区地理,40(6),1188-1197.
MLA	顾畛逵,et al."内蒙古十大孔兑流域地貌演化格局及其成因机制".干旱区地理 40.6(2017):1188-1197.