Data on surface water bodies like rivers, dams, reservoirs, and related  flow characteristics, along with assessments for water risks, stress, and flood risk. 

freshwater

Freshwater

Data related to water scarcity, water quality, flood risk, and water stress.

water-risks

Water Risks

### Overview  
  
Baseline water stress measures the ratio of total water withdrawals to available renewable surface and groundwater supplies. A higher ratio indicates more competition among users. These ratios were then converted into risk scores based on the thresholds defined in the methodology. These risk scores range from low water stress (<10%) to extremely high water stress (>80%). Water withdrawals include domestic, industrial, irrigation and livestock consumptive and non-consumptive uses. Available renewable water supplies include surface and groundwater supplies and the impact of upstream consumptive water use and large dams on downstream water availability. Water stress values are available per sub-basin (HydroBASIN level 6).   
  
### Methodology  
  
Aqueduct used the global hydrological model, PCRaster Global Water Balance (PCR-GLOBWB
2), to calculate five indicators. Baseline water stress is one of those indicators and was calculated using the gross and net total withdrawal and available water per sub-basin time series from the default model run.   
  
The model was first used to calculate a time series of water stress per catchment per month. To calculate water stress, total withdrawals were divided by the available renewable surface and groundwater supplies. Net consumptive water use was subtracted from the total available renewable water supply before the ratio was calculated. The results were output in 12 monthly time series time series of water stress per sub-basin. Water resources in delta sub-basins were pooled.  
  
Next, the time series were converted into baseline values using an ordinary least squares (OLS) regression. For example, the regression output for January 2014 represents the chronic, long-term condition of water stress in January’s from 1960 to 2014. This was repeated for every month and then averaged into an annual value.  All raw values were limited to a maximum of 100% and a minimum of 0%.   
  
Sub-basins that were classified “Arid and low water use” were handled separately and were given a raw value for baseline water stress of -1.  
  
Finally, raw baseline water stress values were converted to risk scores between 0 and 5, based on quantiles. These scores were placed into categories indicating how high the risk for this indicator is. The thresholds for raw baseline water stress values and the corresponding risk scores that were used in each category are defined below as Risk Category (Risk Scores): Raw Value Thresholds.  
  
- Low (0-1): < 10%  
  
- Low to medium (1-2): 10-20%  
  
- Medium to high (2-3): 20-40%  
  
- High (3-4): 40-80%  
  
- Extremely high (4-5): >80%  
  
- Arid and low water use (5): -1  
  
For the full documentation, please see the source [methodology](https://www.wri.org/publication/aqueduct-30).  
  
### Additional Information  
  
Resource Watch shows only a subset of the dataset. For access to the full dataset and additional information, click on the “Learn more” button.  
  
### Disclaimer  
  
Excerpts of this description page were taken from the source metadata.

Baseline Water Stress, Aqueduct 3.0

wat-050-aqueduct-baseline-water-stress-crt

agriadapt

AgriAdapt

1960 to 2014 Baseline Water Stress

Measures the ratio of water withdrawals to available renewable surface and groundwater at the catchment scale

AgriAdapt

Aqueduct Baseline Water Stress

1960 to 2014 Baseline Water Stress