Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.geomorph.2006.01.043 |
Channel response to a new hydrological regime in southwestern Australia | |
Callow, J. N.1,2; Smettem, K. R. J.2 | |
通讯作者 | Callow, J. N. |
来源期刊 | GEOMORPHOLOGY |
ISSN | 0169-555X |
出版年 | 2007 |
卷号 | 84期号:3-4页码:254-276 |
英文摘要 | The Kent River flows from semi-arid headwaters in the agricultural (wheatbelt) region of Western Australia to a wetter and forested lower-catchment. It is set in an atypical fluvial environment, with rainfall decreasing inland towards a low-relief upper catchment. Replacement of native deep-rooted perennial vegetation with shallow-rooted seasonal crops has altered the hydrology of the upper catchment. Clearing for agriculture has also increased recharge of regional groundwater systems causing groundwater to rise and mobilise salt stores. This has increased stream salinity which has degradation riparian vegetation and decreased flow resistance. Elevated groundwater has also affected streamflow, increasing flow duration and annual discharge. The altered hydrological regime has affected geomorphic stability, resulting in channel responses that include incision and removal of uncohesive material. Channel response is variable, showing a high dependence on channel morphotype, channel boundary material and severity of salinity (degree of vegetation degradation). Response in confined reaches bounded by sandy material has been characterised by minor lateral bank erosion. In the fine-grained, wider, low-gradient reaches, mid-channel islands have been stripped of sandy sediment where vegetation has degraded. Following an initial period of high erosion rates in these reaches, the channel is now slowly adjusting to a new set of boundary conditions. The variable response has significant implications for management of salt affected rivers in southwestern Australia. (c) 2006 Elsevier B.V. All rights reserved. |
英文关键词 | erosion human impact land management riparian environment salinity western Australia |
类型 | Article ; Proceedings Paper |
语种 | 英语 |
国家 | Australia |
收录类别 | CPCI-S ; SCI-E |
WOS记录号 | WOS:000251894500009 |
WOS关键词 | NEW-SOUTH-WALES ; RIPARIAN PLANT-COMMUNITIES ; WESTERN-AUSTRALIA ; BEGA CATCHMENT ; SOUTHEASTERN AUSTRALIA ; STREAMFLOW GENERATION ; RIVER REHABILITATION ; WINTER RAINFALL ; SEDIMENT ; VEGETATION |
WOS类目 | Geography, Physical ; Geosciences, Multidisciplinary |
WOS研究方向 | Physical Geography ; Geology |
来源机构 | University of Western Australia |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/154321 |
作者单位 | 1.Univ Western Australia, Sch Earth & Geog Sci, Crawley, WA 6009, Australia; 2.Univ Western Australia, Sch Environm Syst Engn, Crawley, WA 6009, Australia |
推荐引用方式 GB/T 7714 | Callow, J. N.,Smettem, K. R. J.. Channel response to a new hydrological regime in southwestern Australia[J]. University of Western Australia,2007,84(3-4):254-276. |
APA | Callow, J. N.,&Smettem, K. R. J..(2007).Channel response to a new hydrological regime in southwestern Australia.GEOMORPHOLOGY,84(3-4),254-276. |
MLA | Callow, J. N.,et al."Channel response to a new hydrological regime in southwestern Australia".GEOMORPHOLOGY 84.3-4(2007):254-276. |
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