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HYDROLOGIC DATA DEVELOPMENT SYSTEM.
| 题名： | HYDROLOGIC DATA DEVELOPMENT SYSTEM. |
| 作者： | Smith-PN |
| 关键词： | HYDROLOGIC-DATA-DEVELOPMENT-SYSTEM; GEOGRAPHIC-INFORMATION-SYSTEMS; TEXAS-; HIGHWAYS-; SOIL-CHARACTERISTICS; RAINFALL-; LAND-USE; POLITICAL-BOUNDARIES; TABLES-DATA; RUNOFF-; COEFFICIENTS-; SPATIAL-ANALYSIS-TECHNIQUES; DRAINAGE-BOUNDARIES; FLOW-PATHS; WATERSHEDS-; SLOPE-TERRAIN; FLOOD-FREQUENCY |
| 摘要： | The Hydrologic Data Development System is a prototype system of spatial data and menu-driven programs that allows user-interactive determination of hydrologic parameters and estimation of flood-frequency relationships for the design of highway drainage structures. The program employs Arc/Info, a commercial geographical information system. A data base was developed to cover the extent of Texas at a scale of 1:2,000,000 and a smaller sample area of northeast Texas at a scale of 1:250,000. The data include digital-elevation models, major highways, soil characteristics, design rainfall depth-frequency-duration, land use, stream gauge sites, hydrologic regions, and political boundaries. New tables were developed to spatially relate soil characteristics and land use to runoff coefficients used in the Natural Resources Conservation Service Runoff Curve Number method. The system employs spatial-analysis techniques to establish an outfall, to delineate drainage boundaries and flow paths using relevant digital-elevation data, and to use other data layers to determine parameters such as average watershed slope, time of concentration, area-weighted runoff curve numbers, and area-weighted design rainfall. Input files can be established and submitted to the Texas Hydraulic System computer program to determine flood-frequency relationships. |
| 总页数： | Transportation Research Record. 1997. (1599) pp118-127 (5 Fig., 3 Tab., 21 Ref.) |
| 报告类型： | 科技报告 |
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