Evaluation of geomorphic control on flood hazard through Geomorphic Instantaneous Unit Hydrograph.
VJ Vikrant Jain, R Sinha - 2003 - cabidigitallibrary.org
2003•cabidigitallibrary.org
Flood hazard in a basin depends upon the hydrological response of the upstream basin
area. The upstream basin area may produce different amounts of run-off for a given rainfall
based on its hydrologic response. The present communication shows the importance of
drainage network characteristics in understanding the hydrologic response of a basin. The
study was carried out through Geomorphic Instantaneous Unit Hydrograph analysis,
wherein Horton's morphometric ratios were used to define the drainage network. A flood …
area. The upstream basin area may produce different amounts of run-off for a given rainfall
based on its hydrologic response. The present communication shows the importance of
drainage network characteristics in understanding the hydrologic response of a basin. The
study was carried out through Geomorphic Instantaneous Unit Hydrograph analysis,
wherein Horton's morphometric ratios were used to define the drainage network. A flood …
Abstract
Flood hazard in a basin depends upon the hydrological response of the upstream basin area. The upstream basin area may produce different amounts of run-off for a given rainfall based on its hydrologic response. The present communication shows the importance of drainage network characteristics in understanding the hydrologic response of a basin. The study was carried out through Geomorphic Instantaneous Unit Hydrograph analysis, wherein Horton's morphometric ratios were used to define the drainage network. A flood-prone river basin in north Bihar plains, India, was selected as a study area. The study shows that the length ratio (RL) significantly influenced the hydrologic response of a river basin. Hence, computation of this parameter should be included in flood analysis of any river.
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