INTERACTIONS BETWEEN UPLAND CATCHMENT AND LOWLAND RIVERS - AN APPLIED AUSTRALIAN CASE-STUDY

被引：33

作者：

BRIZGA, SO

FINLAYSON, BL

机构：

[1] School of Environmental Planning, University of Melbourne, Parkville

[2] Department of Geography, University of Melbourne, Parkville

来源：

GEOMORPHOLOGY | 1994年 / 9卷 / 03期

关键词：

D O I：

10.1016/0169-555X(94)90062-0

中图分类号：

P9 [自然地理学];

学科分类号：

0705 ; 070501 ;

摘要：

Persistent allegations have been made, mainly by Victorian farmers, that channel and floodplain aggradation are occurring on die floodplain of the Snowy River in Victoria as a consequence of accelerated erosion of degraded agricultural land in parts of the New South Wales upland catchment. These claims prompted the Victorian Department of Water Resources to initiate geomorphological investigations involving reviews of historical evidence, including sequential aerial photographs, and a study of sediment sources based on environmental tracers. A qualitative approach set within a sediment budget framework was adopted for data integration, a detailed quantitative analysis being precluded by financial, temporal and practical constraints. No compelling evidence was found to support claims of recent channel aggradation in the downstream Snowy River. Transfer of sediment eroded from catchment slopes in NSW to the lowland floodplain in Victoria is indirect, with some sediments stored temporarily in fans and floodplains within tributary catchments and in the Snowy valley for long delay times. Storage and interbasin transfer of water as part of the Snowy Mountains Scheme have affected sediment delivery. The catchment upstream of Lake Jindabyne is effectively isolated by this large impoundment, and sediment transport rates as far downstream as the Delegate River junction appear to have significantly decreased as the result of the considerable reduction in discharge.

引用

页码：189 / 201

页数：13

共 36 条

[1] Brizga, Finlayson, The Snowy River Sediment Study: Investigation into the Distribution, Transport and Sources of Sand in the Snowy River between Lake Jindabyne and Jarrahmond, Report No. 81, (1992)
[2] Brune, Trap efficiency of reservoirs, Transactions, American Geophysical Union, 34, pp. 407-418, (1953)
[3] Caine, Swanson, Geomorphic coupling of hillslope and channel systems in two small mountain basins, Z. Geomorphol. N.F., 33, pp. 189-203, (1989)
[4] Caitcheon, Murray, Wasson, The Snowy River Sediment Study: Sourcing Sediments using Environmental Tracers, Report No. 80, (1992)
[5] Costin, A Study of the Ecosystems of the Monaro Region of New South Wales with Special Reference to Soil Erosion, (1954)
[6] Costin, Vegetation, soils, and climate in Late Quaternary southeastern Australia, Aboriginal Man and Environment in Australia, pp. 26-37, (1971)
[7] Dietrich, Dunne, Sediment budget for a small catchment in mountainous terrain, Z. Geomorphol. N.F. Suppl., 29, pp. 191-206, (1978)
[8] Dietrich, Dunne, Humphrey, Reid, Construction of sediment budgets for drainage basins, Sediment Budgets and Routing in Forested Drainage Basins, pp. 5-23, (1982)
[9] Eyles, Changes in drainage networks since 1820, Southern Tablelands, N.S.W., Australian Geographer, 13, pp. 377-386, (1977)
[10] Finlayson, Bird, Initial Investigation into the Extent and Nature of the Current Sedimentation Problem on the Lower Snowy River, Report produced for the Department of Water Resources Victoria, (1989)

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