GCN250是一个全球一致的网格化数据集，根据新的全球土地覆盖（300米）和土壤数据（250米）定义250米空间分辨率的CN

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全球水文曲线编号(GCN250)¶。
GCN250是一个全球一致的网格化数据集，根据新的全球土地覆盖（300米）和土壤数据（250米）定义250米空间分辨率的CN。GCN250代表了欧洲航天局2015年全球土地覆盖数据集（ESA CCI-LC）重新采样到250米并与2018年发布的水文土壤组全球数据产品（HYSOGs250m）进行地理登记的组合的径流。该数据的潜在应用包括水文设计、土地管理应用、洪水风险评估和地下水补给建模。CN值的变化取决于先期径流条件（ARC），它受降雨强度和持续时间、总降雨量、土壤水分条件、覆盖密度、生长阶段和温度的影响.前言 – 床长人工智能教程

文献引用：

Jaafar, H.H., Ahmad, F.A. & El Beyrouthy, N. GCN250, new global gridded curve numbers for hydrologic modeling and design.
Sci Data 6, 145 (2019). https://doi.org/10.1038/s41597-019-0155-x

Machine-accessible metadata file describing the reported data (ISA-Tab format)

 代码：

var GCN250_Average =  ee.Image("users/jaafarhadi/GCN250/GCN250Average")
var GCN250_Dry =  ee.Image("users/jaafarhadi/GCN250/GCN250Dry")
var GCN250_Wet = ee.Image("users/jaafarhadi/GCN250/GCN250Wet")


// visualize the Dry GCN dataset
var vis = {
  min:40, 
  max:75, 
  palette: ['Red','SandyBrown','Yellow','LimeGreen', 'Blue','DarkBlue']
  
};

Map.addLayer(GCN250_Dry, vis, 'CN Dry');

Map.setCenter(17.93, 7.71, 2);

代码链接： 

https://code.earthengine.google.com/?scriptPath=users/sat-io/awesome-gee-catalog-examples:hydrology/GLOBAL-HYDROLOGIC-CURVE-NUMBER

Extra Info: Dataset is also available as an Earth Engine App (Global Hydrologic Curve Number Explorer) It allows users to visualize the gridded hydrologic curve number dataset at ~250m resolution globally.

Link to the app: Hydrologic Curve Number

Link to app code: https://code.earthengine.google.com/086bf71b76fcaae637df3df2148fbce4

License¶

This work is distributed under the Creative Commons Attribution 4.0 International License

Created and Curated by: Hadi H. Jaafar, Farah A. Ahmad, Naji El Beyrouthy

Keywords: Curve Number, Runoff, Hydrology

Last updated: 2019-06-20

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