Development of highly accurate global polygonal drainage basin data
Development of highly accurate global polygonal drainage basin data
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DOI：
10.1002/hyp.7186
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发表时间：
2009-02-15
影响因子：
3.2
通讯作者：
Matsuoka, Yuzuru
中科院分区：
文献类型：
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作者：
Masutomi, Yuji;Inui, Yusuke;Matsuoka, Yuzuru
本研究开发了高精度的全球多边形流域数据（PDBD）。利用高分辨率（约100 m-1 km）数字高程模型（DEM），通过自动和非自动两种方法获得了PDBD，以抑制DEM误差。自动方法是“流燃烧”和“山脊围栏”，而非自动方法是手动校正DEM误差的方法（“手动校正”）。为了推导PDBD，我们收集并使用了来自政府、研究所、出版商和与水有关的项目发布的地理流域和河流数据。高分辨率dem反演得到的PDBD可以较详细地反映盆地边界，从而获得精确的地理地形信息。这些特征有助于在水相关研究中利用水文模型进行区域和全球分析、评估和管理。为了评估所得PDBD的准确性，我们进行了两种类型的比较。首先，我们将导出的PDBD与收集的盆地数据进行了地理比较。推导的PDBD与实测盆地数据具有较好的地理一致性，且其地理一致性优于HYDRO1k。其次，我们将基于所得PDBD的上游区域和排放量与观测到的上游区域和排放量进行了比较。基于PDBD的上游面积和流量与实测数据吻合较好，且与HYDRO1k的吻合较好。这些比较表明，所得的PDBD具有较高的准确性和可靠性。由此得出的PDBD被认为提供了关于地球表面排水的最佳信息。版权所有(C) 2008约翰威利父子有限公司
Highly accurate global polygonal drainage basin data (PDBD) was developed in this research. The PDBD was derived from digital elevation models (DEMs) at high-resolution (about 100 m-1 km) by automatic and non-automatic methods to suppress DEM errors which derive wrong PDBD. The automatic methods are 'stream burning' and 'ridge fencing', while the non-automatic method is one which manually corrects DEM errors ('manual correction'). For the derivation of the PDBD, we collected and used geographic basin and river data published from governments, institutes, publishers, and water-related programs. The PDBD derived from the DEMs at high-resolution can represent the boundaries of the basins in detail, and precise geographic and topographic information can be thus derived. These features are helpful for regional and global analysis, assessment, and management with hydrological models in water-related studies. To assess the accuracy of the derived PDBD, we conducted two types of comparisons. Firstly, we geographically compared the derived PDBD with the collected basin data. The derived PDBD showed good geographic agreement with the collected basin data, and the geographic agreement of the derived PDBD was better than that of HYDRO1k. Secondly, we compared upstream areas and discharges based on the derived PDBD with the observed upstream areas and discharges. The upstream areas and discharges based on the derived PDBD showed good agreement with the observed upstream areas and discharges, and the agreement of the derived PDBD was better than that of HYDRO1k. These comparisons reveal that the derived PDBD are highly accurate and reliable. The derived PDBD are thus thought to offer the best information on the surface drainage of the earth. Copyright (C) 2008 John Wiley & Sons, Ltd.