Knowledge Resource Center for Ecological Environment in Arid Area
| DOI | 10.2172/6161180 |
| 报告编号 | DOE/ER/60472-T1 |
| 来源ID | OSTI_ID: 6161180 |
| Remote sensing and hydrologic modeling of arid watersheds: A scale analysis | |
| Gardner, T.W. (Pennsylvania State Univ., University Park, PA (USA). Dept. of Geosciences); Petersen, G.W. (Pennsylvania State Univ., University Park, PA (USA). Dept. of Agronomy) | |
| 英文摘要 | The increasing availability of digital elevation data (DED) created from remotely sensed data has promoted the development of computer algorithms for the calculation of geomorphometric properties of the land surface. These include parameters that are tedious or impossible to do by hand, for example, stream properties by order and flow path mapping for every location within the drainage basin. Flow paths especially are critical for water routing in hydrologic models. These algorithms can be used to explore spatial trends in landscape properties as a function of rock type, climate or neotectonic environment. The DED can be readily linked with a geographic information system (GIS) which is used to parameterize a quasi-physically based surface runoff model. Various representations (Shreve orders) of the watershed are created by simplifying a stream network delineated from the DED. Different Shreve orders produce significantly different geomorphometrics that affect simulated runoff volumes. At one of the study sites, the DED are not of sufficient detail to allow stream network extraction. Therefore, classification of SPOT panchromatic data was used to delineate ephemeral, fluvial networks on this low-relief, arid basin. A one pixel proximity search classified correctly over 80 percent of the channelized flow. 3 figs., 2 tabs. |
| 出版年 | 1990 |
| 报告类型 | Technical Report |
| 语种 | 英语 |
| 国家 | 美国 |
| 来源学科分类 | 11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS ; 12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES ; 58 GEOSCIENCES ; 99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE ; ARID LANDS ; WATERSHEDS ; HYDROLOGY ; REMOTE SENSING ; RADIOACTIVE WASTE DISPOSAL ; ENVIRONMENTAL EFFECTS ; ALGORITHMS ; CLIMATES ; GROUND WATER ; PROGRESS REPORT ; S CODES ; SEDIMENTATION ; TERRESTRIAL ECOSYSTEMS ; COMPUTER CODES ; DOCUMENT TYPES ; ECOSYSTEMS ; HYDROGEN COMPOUNDS ; MANAGEMENT ; MATHEMATICAL LOGIC ; OXYGEN COMPOUNDS ; WASTE DISPOSAL ; WASTE MANAGEMENT ; WATER 053000* -- Nuclear Fuels-- Environmental Aspects ; 052002 -- Nuclear Fuels-- Waste Disposal & Storage ; 580000 -- Geosciences ; 990200 -- Mathematics & Computers |
| URL | http://www.osti.gov/scitech/servlets/purl/6161180 |
| 资源类型 | 科技报告 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/264285 |
| 推荐引用方式 GB/T 7714 | Gardner, T.W. ,Petersen, G.W. . Remote sensing and hydrologic modeling of arid watersheds: A scale analysis,1990. |
| 条目包含的文件 | 条目无相关文件。 | |||||
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