全球河流网络及相应的水资源区
河流网络和水资源区（WRZ）对于水资源的规划、利用、开发、保护和管理至关重要。目前，世界上的河网和水资源区大多是根据数字高程模型数据自动获得的，这些数据不够准确，尤其是在平原地区。此外，WRZ代码与河网不一致。作者提出了一系列方法，生成了分辨率较高、一致性较强的全球河网和相应的1-4级WRZ，该数据集为世界水资源的合理利用和社会可持续发展提供了重要依据和支持。您可以在这里阅读该论文全文
全球河流网（GRN）和水资源区（WRZ）的等级划分
1级河流（L1级河流）是指流入大海或湖泊的河流。
2级河流（L2级河流）是指流入L1级河流的河流，其汇流面积大于L1级河流的百分之一或1万平方公里。
第三级河流（L3级河流）是指流入L2级河流的河流，其汇合面积大于L2级河流的百分之一或1000平方公里。
4级河流（L4级河流）是指流入L3级河流的河流，其汇合面积大于L3级河流的百分之一或100平方公里。
不满足上述条件的支流被忽略了。
WRZ对应于河流水位
Paper Citation¶
Yan, D., Wang, K., Qin, T. et al. A data set of global river networks and corresponding water resources zones divisions. Sci Data 6, 219 (2019). https://doi.org/10.1038/s41597-019-0243-y
Data Citation¶
Yan, Denghua; Wang, Kun; Qin, Tianling; Weng, Baisha; wang, Hao; Bi, Wuxia; et al. (2019): A data set of global river networks and corresponding water resources zones divisions. figshare. Dataset. https://doi.org/10.6084/m9.figshare.8044184.v6
数据预处理
各大洲的河流网络是由作者提供的。另一方面，水资源区是以各大洲的水位为基础的子集，所以总共有24个文件。为了使这些数据可以作为大的特征集，跨越多个大洲的水位被合并为单一特征集。
| Global River Network | Levels |
| Asia | Level 1,2,3,4 |
| Africa | Level 1,2,3,4 |
| Australia | Level 1,2,3,4 |
| Europe | Level 1,2,3,4 |
| North America | Level 1,2,3,4 |
| South America | Level 1,2,3,4 |
| Water Resources Zone | Levels |
| Asia | Level 1,2,3,4 |
| Africa | Level 1,2,3,4 |
| Australia | Level 1,2,3,4 |
| Europe | Level 1,2,3,4 |
| North America | Level 1,2,3,4 |
| South America | Level 1,2,3,4 |
| Combined Water Resources Zones | Locations |
| Level 1 | All Continents |
| Level 2 | All Continents |
| Level 3 | All Continents |
| Level 4 | All Continents |
代码：
var af_river = ee.FeatureCollection("projects/sat-io/open-datasets/GRN/af_river"); var as_river = ee.FeatureCollection("projects/sat-io/open-datasets/GRN/as_river"); var au_river = ee.FeatureCollection("projects/sat-io/open-datasets/GRN/au_river"); var eu_river = ee.FeatureCollection("projects/sat-io/open-datasets/GRN/eu_river"); var na_river = ee.FeatureCollection("projects/sat-io/open-datasets/GRN/na_river"); var sa_river = ee.FeatureCollection("projects/sat-io/open-datasets/GRN/sa_river"); var WRZ_L1 = ee.FeatureCollection("projects/sat-io/open-datasets/WRZ/WRZ_L1"); var WRZ_L2 = ee.FeatureCollection("projects/sat-io/open-datasets/WRZ/WRZ_L2"); var WRZ_L3 = ee.FeatureCollection("projects/sat-io/open-datasets/WRZ/WRZ_L3"); var WRZ_L4 = ee.FeatureCollection("projects/sat-io/open-datasets/WRZ/WRZ_L4"); Map.addLayer(WRZ_L1.style({fillColor: '00000000',color: '#d7191c'}),{},'Global Level 1 Water Resources Zone'); Map.addLayer(WRZ_L2.style({fillColor: '00000000',color: '#fdae61'}),{},'Global Level 2 Water Resources Zone',false) Map.addLayer(WRZ_L3.style({fillColor: '00000000',color: '#abd9e9'}),{},'Global Level 3 Water Resources Zone',false) Map.addLayer(WRZ_L4.style({fillColor: '00000000',color: '#2c7bb6'}),{},'Global Level 4 Water Resources Zone',false) Map.addLayer(sa_river.style({fillColor: '00000000',color: '#002B4D'}),{},'South America River Network')
Data subsets¶
The Water Resources Zones are also available as level based extracts for each countinent. Use the prefix and the level to get to each feature collection. The format is
projects/sat-io/open-datasets/WRZ/(Level)/(Prefix)_(Level)
Here are the prefix list and some examples
| Country | Prefix | Path |
| Asia | as | projects/sat-io/open-datasets/WRZ/L1/as_wrz1 |
| Africa | af | projects/sat-io/open-datasets/WRZ/L2/af_wrz2 |
| Australia | au | projects/sat-io/open-datasets/WRZ/L3/au_wrz3 |
| Europe | eu | projects/sat-io/open-datasets/WRZ/L4/eu_wrz4 |
| North America | na | projects/sat-io/open-datasets/WRZ/L1/na_wrz1 |
| South America | sa | projects/sat-io/open-datasets/WRZ/L3/sa_wrz3 |
License¶
This work is distributed under the Creative Commons Attribution 4.0 International License
Created by: Yan, D., Wang, K., Qin, T. et al.
Curated by: Samapriya Roy
Keywords: River networks, Water Resources, Hydrology
Last updated: 2019-09-28
