Fig 1.
Location and distribution of the hydrological and meteorological stations in the Yanhe River Basin.
Yanhe river watershed (right; red square) in China, meteorological station locations marked by black triangles. The blue line indicate yanhe river. Red dots indicate administrative center and black flag indicate hydrologic station. The Yanhe river catchment (left) and elevation range. Digital elevation model data source: the Geospatial Data Cloud (http://www.gscloud.cn/). The map was prepared in ARCGIS using basin boundaries from the China Database of Topographic map.
Fig 2.
Framework for assessing the ecological water stress in the Yanhe River Basin.
Fig 3.
Land use map of the Yanhe River Basin in the different years.
The map was prepared in ARCGIS using Classification of land use types from the Resource and Environment Science and Data Center (http://www.resdc.cn). The land uses of 2017 were interpreted from Landsat OLI images which were collected from the Geospatial Data Cloud (http://www.gscloud.cn/).
Table 1.
Land uses in the Yanhe River Basin in 1980 and 2017.
Table 2.
Transition matrix of land use conversions (km2) from 1980 to 2017.
Table 3.
The initial ranges and final values of the sensitivity parameters.
Fig 4.
Time series plot between the observed and simulated streamflows at the monthly time scale and 95% prediction uncertainty bands.
Table 4.
Results of the SWAT model evaluation indicators in the Yanhe River Basin.
Fig 5.
Time series changes of annual water resources.
Fig 6.
Temporal changes of the hydrological elements.
Fig 7.
Spatial distributions of blue and green waters.
The map was prepared in ARCGIS using sub-basin boundaries and blue/green water calculation results from the Results of watershed division on Yanhe river Basin. The spatial distribution range values of scenario 1 and scenario 2 were represented in the same color, and the spatial distribution range of their difference values was represented separately.
Fig 8.
Land use conversions between 1980 and 2017.
The map was prepared in ARCGIS using markov model.
Fig 9.
Agricultural footprint.
Table 5.
WFs of the forest from April to October in different years (billion m3).
Table 6.
WFs of grassland from April to October in different years (billion m3).
Fig 10.
Agricultural virtual flows during 1994–2017.
Table 7.
Ecological water stress index values of the two land use scenarios in the Yanhe River Basin.
Table 8.
Average annual water balance components.
Fig 11.
Change trend of the annual maximum LAI for the Yanhe River Basin during 2000–2015.