Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2017WR021206 |
Hydrography-Driven Coarsening of Grid Digital Elevation Models | |
Moretti, Giovanni; Orlandini, Stefano | |
2018-05-01 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2018 |
卷号 | 54期号:5页码:3654-3672 |
文章类型 | Article |
语种 | 英语 |
国家 | Italy |
英文摘要 | A new grid coarsening strategy, denoted as hydrography-driven coarsening, is developed in the present study. The hydrography-driven coarsening is designed to retain the essential hydrographic features of valleys and channels observed in high-resolution digital elevation models: (1) depressions are filled in the considered high-resolution digital elevation model, (2) the obtained topographic data are used to extract a reference grid network composed of all surface flow paths, (3) the Horton order is assigned to each link of the reference grid network, and (4) within each coarse grid cell, the elevation of the point lying along the highest-order path of the reference grid network and displaying the minimum distance to the cell center is assigned to this coarse grid cell center. The capabilities of the hydrography-driven coarsening to provide consistent surface flow paths with respect to those observed in high-resolution digital elevation models are evaluated over a synthetic valley and two real drainage basins located in the Italian Alps and in the Italian Apennines. The hydrography-driven coarsening is found to yield significantly more accurate valley and channel profiles than existing coarsening strategies. In absolute terms, the obtained valleys and channels compare favorably with those observed. In addition, the proposed coarsening strategy is found to reduce drastically the impact of depression-filling in the obtained coarse digital elevation models. The hydrography-driven coarsening strategy is therefore advocated for all those cases in which the relief of the extracted drainage network is an important hydrographic feature. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000442351300022 |
WOS关键词 | NETWORK ; CHANNEL ; DIRECTIONS ; ALGORITHM |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/21609 |
专题 | 资源环境科学 |
作者单位 | Univ Modena & Reggio Emilia, Dipartimento Ingn Enzo Ferrari, Modena, Italy |
推荐引用方式 GB/T 7714 | Moretti, Giovanni,Orlandini, Stefano. Hydrography-Driven Coarsening of Grid Digital Elevation Models[J]. WATER RESOURCES RESEARCH,2018,54(5):3654-3672. |
APA | Moretti, Giovanni,&Orlandini, Stefano.(2018).Hydrography-Driven Coarsening of Grid Digital Elevation Models.WATER RESOURCES RESEARCH,54(5),3654-3672. |
MLA | Moretti, Giovanni,et al."Hydrography-Driven Coarsening of Grid Digital Elevation Models".WATER RESOURCES RESEARCH 54.5(2018):3654-3672. |
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