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Response of the Citanduy River to Developments

by Jerry R. Richardson, Colorado State Univ, Fort Collins, CO, USA,
Michael A. Stevens, Colorado State Univ, Fort Collins, CO, USA,



Document Type: Proceeding Paper

Part of: Water Forum '86: World Water Issues in Evolution

Abstract:

The sinuous alluvial reach of the Citanduy River in Java, Indonesia has been surprisingly stable in spite of man-made cutoffs which have reduced the channel length from 98. 7 km to 78. 6 km over the past 80 years. When continuous levees were constructed on both banks, confining floods primarily to the main channel, bank erosion began in slightly more than half of the remaining 96 bends. The banks of the river are composed of hallyosite, a strong, light clay derived from volcanic rocks, which gives the river its stability. The eruption of volcano Galunggung in the headwaters in 1982 caused aggradation in a short upstream subreach of the alluvial river. Farther downstream the effects of Galunggung sand were masked by the response of the river bed to levees.

Subject Headings: River bank stabilization | River and stream beds | Alluvial channels | Rivers and streams | Soil stabilization | Levees and dikes | High-rise buildings | Indonesia | Asia

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