Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s11069-010-9553-2 |
Quantitative technique for assessing the geomorphic thresholds for floodplain instability and braiding in the semi-arid environment | |
Dust, David W.; Wohl, Ellen E. | |
通讯作者 | Dust, David W. |
来源期刊 | NATURAL HAZARDS |
ISSN | 0921-030X |
出版年 | 2010 |
卷号 | 55期号:1页码:145-160 |
英文摘要 | For the semi-arid environment of southern California, a reach-scale classification system and conceptual model were created to synthesize the observed floodplain forms into three basic floodplain continuums: armored, non-armored, and active-regional alluvial fan. These continuums are comprised of three to five alluvial floodplain forms (cascade, step-pool, plane-coarse-bed, plane-mixed-bed, plane-fine-bed, pool-riffle, braided, and dune-ripple). For the non-armored floodplain continuum, a floodplain state diagram has been generated to quantitatively describe the natural downstream progression of floodplain forms and geometry, using specific stream power and the width-to-depth ratio as the state and shape metrics, respectively. Based on field data for 91 cross sections along 14 watercourses, this floodplain state diagram provided the basis to define geomorphic thresholds for floodplain instability and braiding using logistic regression analyses. This method for defining floodplain instability thresholds provides a unique management tool by providing both a systematic and a quantitative means to assess the stability state of watercourses and, thereby, provide a means for assessing the potential for the hazards associated with watercourse instability. |
英文关键词 | Reach morphology Geomorphic thresholds Floodplain instability Braiding Logistic regression |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000282829500011 |
WOS关键词 | ARID CENTRAL AUSTRALIA ; LOGISTIC ANALYSIS ; STREAMS ; RIVERS |
WOS类目 | Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences ; Water Resources |
WOS研究方向 | Geology ; Meteorology & Atmospheric Sciences ; Water Resources |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/165730 |
作者单位 | Colorado State Univ, Dept Geosci, Ft Collins, CO 80523 USA |
推荐引用方式 GB/T 7714 | Dust, David W.,Wohl, Ellen E.. Quantitative technique for assessing the geomorphic thresholds for floodplain instability and braiding in the semi-arid environment[J],2010,55(1):145-160. |
APA | Dust, David W.,&Wohl, Ellen E..(2010).Quantitative technique for assessing the geomorphic thresholds for floodplain instability and braiding in the semi-arid environment.NATURAL HAZARDS,55(1),145-160. |
MLA | Dust, David W.,et al."Quantitative technique for assessing the geomorphic thresholds for floodplain instability and braiding in the semi-arid environment".NATURAL HAZARDS 55.1(2010):145-160. |
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