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Geoindicators for river and river-valley monitoring in the humid tropics

Environmental Geology

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DOI: 10.1007/s00254-002-0550-y

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Abstract

Geoindicators for rivers and river valleys in the humid tropics are suggested to indicate environmental change during periods of up to a century. Geoindicators suggested for upland areas of supply are rainfall-runoff relations, rates of soil movement and slope failure, and analyses of drainage density. Data applicable to sediment storage in lowlands are rates of sediment deposition as shown by monuments, short-lived radioisotopes, and pollen. Discharges of water, sediment, and dissolved solids are basic geoindicators for large streams, especially when analyses include flood frequency, stage-discharge relations, flow duration, sediment-rating curves, and comparisons of dissolved loads to sediment loads. The utility of geoindicators in the humid tropics may be greatest if observation sites are selected with a network design to permit comparisons of sites with similar conditions of climate and drainage-basin characteristics.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Geoindicators for river and river-valley monitoring in the humid tropics
Series title:
Environmental Geology
DOI:
10.1007/s00254-002-0550-y
Volume
42
Issue:
7
Year Published:
2002
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Environmental Geology
First page:
725
Last page:
735
Number of Pages:
11