HIGH-RESOLUTION FLOW DIRECTION MAP OF JAPAN

HIGH-RESOLUTION FLOW DIRECTION MAP OF JAPAN
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日本高分辨率流向图

DOI:
10.2208/jscejhe.74.5_i_163
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发表时间:
2020
期刊:
Journal of JSCE
影响因子:
--
通讯作者:
T. Sayama
T. Sayama
中科院分区:
--
文献类型:
--
作者:
Dai Yamazaki;Saeka Togashi;A. Takeshima;T. Sayama

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我们使用“Kiban Chizu Joho”数字高程模型和“Kokudo Suchi Joho”水体图层,为整个日本域开发了一个新的表面流向数据集,名为“日本流向图(J-FlwDir)”,分辨率为 1 秒((cid:24)30 m)。由于输入高程数据中的错误,过去计算大域的流向很困难。我们通过开发一种新算法解决了这个问题,该算法首先通过最陡坡度法计算初始猜测流向,然后在需要时通过反转初始猜测流向来确保河流的连通性。与之前的 HydroSHEDS 流向相比,新的流向数据与实际河网具有更好的一致性。我们还生成了补充数据层,例如流量累积区域、调整后的高程和河流宽度。新的流向数据集将在线发布,预计将增强依赖流向数据的地球科学研究。
We developed a new surface flow direction dataset named “Japan Flow Direction Map (J-FlwDir)” at 1-sec ( (cid:24) 30 m) resolution for the entire Japan domain, using “Kiban Chizu Joho” digital elevation model and “Kokudo Suchi Joho” water body layers. The calculation of flow directions for a large domain used to be di ffi cult due to errors in the input elevation data. We solved this problem by developing a new algorithm, which first calculates the initial-guess flow directions by the steepest slope method, and then ensures river connectivity by reversing the initial-guess flow directions when needed. The new flow direction data shows better consistency with the actual river networks compared to the previous HydroSHEDS flow directions. We also generated supplementary data layers such as flow accumulation area, adjusted elevation, and river width. The new flow direction dataset will be published online, and is expected to enhance any geoscience studies which rely on flow direction data.
山崎大、Fiachra OLoughlin、马克·特里格和保罗·贝茨
DOI: --
发表时间: 2015
期刊:
影响因子: --
作者:
Dai Yamazaki;Mark A. Trigg;and Daiki Ikeshima;Dai Yamazaki;GWD-LR: a satellite-based global database of river channel width
通讯作者: GWD-LR: a satellite-based global database of river channel width
DOI: 10.1002/hyp.7186
发表时间: 2009-02-15
影响因子: 3.2
作者:
Masutomi, Yuji;Inui, Yusuke;Matsuoka, Yuzuru
通讯作者: Matsuoka, Yuzuru