Geomorphic Thresholds and Their Influence on Surface Runoff from Small Semiarid Watersheds
| dc.contributor.author | Wallace, D. E. | |
| dc.contributor.author | Lane, L. J. | |
| dc.date.accessioned | 2013-09-04T18:00:19Z | |
| dc.date.available | 2013-09-04T18:00:19Z | |
| dc.date.issued | 1976-05-01 | |
| dc.identifier.issn | 0272-6106 | |
| dc.identifier.uri | http://hdl.handle.net/10150/300973 | |
| dc.description | From the Proceedings of the 1976 Meetings of the Arizona Section - American Water Resources Assn. and the Hydrology Section - Arizona Academy of Science - April 29-May 1, 1976, Tucson, Arizona | en_US |
| dc.description.abstract | The geomorphic threshold concept of landform evolution and its effect on hydrologic performance of drainage systems was investigated on small semiarid watersheds in Southeastern Arizona. Thresholds develop within a geomorphic system with time and can, when exceeded, cause drastic changes in the geomorphic features and in the hydrologic performance of the watershed. The slow continuous evolution of drainage characteristics can be suddenly altered with major readjustment of the landscape taking place. A new state of dynamic equilibrium will then prevail until the drainage system is again subjected to conditions which cause some geomorphic threshold to be exceeded. Areas of potential geomorphic readjustment can be identified from parameters such as channel slope, average land surface slope, drainage density, and mean length of first order streams and these data can be used as components in a calibrated kinematic-cascade model to determine the effects of various degrees of drainage system alteration. The influence on runoff from exceeding various geomorphic thresholds is tested and the resulting hydrologic modifications are simulated and discussed. | |
| dc.language.iso | en_US | en_US |
| dc.publisher | Arizona-Nevada Academy of Science | en_US |
| dc.rights | Copyright ©, where appropriate, is held by the author. | en_US |
| dc.subject | Hydrology -- Arizona. | en_US |
| dc.subject | Water resources development -- Arizona. | en_US |
| dc.subject | Hydrology -- Southwestern states. | en_US |
| dc.subject | Water resources development -- Southwestern states. | en_US |
| dc.title | Geomorphic Thresholds and Their Influence on Surface Runoff from Small Semiarid Watersheds | en_US |
| dc.type | text | en_US |
| dc.type | Proceedings | en_US |
| dc.contributor.department | Southwest Watershed Research Center, Tucson, Arizona 85705 | en_US |
| dc.identifier.journal | Hydrology and Water Resources in Arizona and the Southwest | en_US |
| dc.description.collectioninformation | This article is part of the Hydrology and Water Resources in Arizona and the Southwest collections. Digital access to this material is made possible by the Arizona-Nevada Academy of Science and the University of Arizona Libraries. For more information about items in this collection, contact anashydrology@gmail.com. | en_US |
| refterms.dateFOA | 2018-06-14T16:42:26Z | |
| html.description.abstract | The geomorphic threshold concept of landform evolution and its effect on hydrologic performance of drainage systems was investigated on small semiarid watersheds in Southeastern Arizona. Thresholds develop within a geomorphic system with time and can, when exceeded, cause drastic changes in the geomorphic features and in the hydrologic performance of the watershed. The slow continuous evolution of drainage characteristics can be suddenly altered with major readjustment of the landscape taking place. A new state of dynamic equilibrium will then prevail until the drainage system is again subjected to conditions which cause some geomorphic threshold to be exceeded. Areas of potential geomorphic readjustment can be identified from parameters such as channel slope, average land surface slope, drainage density, and mean length of first order streams and these data can be used as components in a calibrated kinematic-cascade model to determine the effects of various degrees of drainage system alteration. The influence on runoff from exceeding various geomorphic thresholds is tested and the resulting hydrologic modifications are simulated and discussed. |
