川中丘陵区小流域自然侵蚀速率的初步研究
文献类型：期刊论文
| 作者 | 文安邦 ; 贺秀斌; 张信宝
|
| 刊名 | 水土保持学报
 |
| 出版日期 | 2006 |
| 卷号 | 20期号:1页码:1-5 |
| 关键词 | 川中丘陵区 小流域 DEM 自然侵蚀速率 自然泥沙输移比 |
| 其他题名 | Prel iminary Study on Natural Erosion Rates in Smal l Watershed of Siehuan Hil l y Basin |
| 通讯作者 | 张信宝 |
| 合作状况 | 其它 |
| 中文摘要 | 长江三峡中更新世的贯通，导致川中丘陵区河流的急剧下切。两岸广袤的平原被沟谷肢解为起伏的丘陵．现今孤立的丘顶是河流下切前的平原面，沟谷的贫腔体积表征了急剧下切以来的侵蚀量。我们选择内江附近的小河沟流域为研究小流域，采用DEM法测算了沟谷的盆腔体积．并根据阶地绝对年龄，计算了流域的自然侵蚀速率；还估算了流域内的松散堆积物体积．计算了流域的自然泥沙输移比。小河沟流域集水面积10．88km^2。侵蚀沟谷盆腔体积6．57亿m^3。IV级高平原阶地和Ⅲ级阶地砂砾层的绝对年龄分别以0．7Ma和0．4Ma计，相应的自然侵蚀模数分别为216t／（km^2·a）和378／（km^2·a）．和沱江川中丘陵区区间的现代输沙模数397t／（km^2·a）非常接近。流域内松散堆积物总体积不超过200万m^2．流域的自然泥沙输移比为0．997．接近于1。 |
| 英文摘要 | Yangtze River cutting through the Three Gorges in the middle Pleistocene has led to rapid cut—down of river beds in the Sichuan hilly basin．Therefore，the formal wide plains along the rivers have been dissected to be— come hills by tremendous gullies and the isolated hill tops often used to be formal plain surfaces．However，the cavity volume of a gully can represent the total eroded volume of the gully since its formation due to the rapid cut— down of the main river．A small watershed of the Xiaohegou gully near Neijiang city was selected for a study on natural erosion rates in the Sichuan hilly basin．The rates were estimated according to the gully cavity volume ca1．． culated by using the DEM model method and to the terrace age．However，the volume of accumulative deposits in the gully was investigated to estimate the natural sediment delivery rate．The Xiaohegou gully has a drainage area of 1O．88 km ．an eroded gully cavity volume of 0．657 billion m。．The ages of the highest terrace IV and the sec— ond highest terrace nl are 0．7 M a BP and 0．4 Ma BP，respectively．Correspondently，the natural erosion rates are 216 t／(km ·a)for the erosion duration period of 0．7 Ma and 378 t／(km ·a)for the period of 0．4 Ma，respeetively， which are close to the modern sediment yield rate of 397 t／(km。·a)for the Sichuan hilly basin region of the Tuojiang river．In addition·there is at most 2 million m of accumulative deposits in the gully and the natu— ral sediment delivery rate for the gully is 0．997。which is close to 1． |
| 分类号 | S157.1 |
| 资助信息 | 国家“973”项目(2003CB415202);中国科学院知识创新工程项目(KZCX3-SW330,KZCX3-SW422) |
| 语种 | 中文 |
| 公开日期 | 2010-08-17 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/1492]  |
| 专题 | 成都山地灾害与环境研究所_成都山地所知识仓储（2009年以前） 成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室 科技与合作处 |
| 推荐引用方式 GB/T 7714 | 文安邦,贺秀斌,张信宝. 川中丘陵区小流域自然侵蚀速率的初步研究[J]. 水土保持学报,2006,20(1):1-5. |
| APA | 文安邦,贺秀斌,&张信宝.(2006).川中丘陵区小流域自然侵蚀速率的初步研究.水土保持学报,20(1),1-5. |
| MLA | 文安邦,et al."川中丘陵区小流域自然侵蚀速率的初步研究".水土保持学报 20.1(2006):1-5. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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