Mapping sediment sources in a New Zealand Mountain Watershed |
| |
| Authors: | M Paul Mosley |
| |
| Institution: | (1) Forest Research Institute, PO Box 31-011, Christchurch, New Zealand |
| |
| Abstract: | Planning of soil conservation and erosion control schemes to minimize downstream effects requires information on the sources
of sediment supply to a river system. A survey technique for providing an inventory of sediment sources has been developed
in New Zealand; sediment sources are classified in terms of geomorphic type and degree of activity (severity). The technique
is qualitative but is of value for both planning and research because it demands a formal, objective examination of the area
under study. In the Harper-Avoca watershed the technique demonstrated that some well-established beliefs regarding the supply
of sediment to the river systems might be erroneous; sediment supply appears to be controlled primarily by geomorphic and
geologic factors, and human interference with the ecosystem probably has had a minor effect on rates of supply. The bulk of
the sediment comes from large, natural features that are beyond present erosion-control technology, whereas those features
that could be effectively treated supply a relatively small proportion of the river's total sediment load. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
