Table 1.

Spatially explicit inputs to the GWAVA model.

Input data	Resolution	Source
Sub-grid elevation distributiona	30″	HydroSHEDS (Lehner et al., 2008), GTOPO (USGS, 1996)
Locations of irrigated crop types and the start and end of their growing season	5′	MIRCA2000 (Portmann et al., 2010)
Crop characteristics and growth stage durations for 47 irrigated crop types	Monthly, 5′	Allen et al. (1998), Siebert and Döll (2010), MIRCA2000 (Portmann et al., 2010)
Hydrography	n.a. (vector data)	CCM2.1 (Voght et al., 2007)
Soil texture	5′	HWSD (FAO et al., 2009)
Land cover	5′	GLCC (USGS, 2001)
Climate parameters	10′, monthly	CRU TS 1.2 (Mitchell et al., 2004)
Climate parameters	30′, monthly	CRU TS 2.1 (Mitchell and Jones, 2005)
Lake, reservoir and wetland parameters	5′	GLWD (Lehner and Döll, 2004)
Fraction of water extracted from groundwater	Country	Aquastat (FAO), Eurostat (European Commission, 2010)
Urban, rural, and industrial water demand per capita	Country	Eurostat (European Commission, 2010)
Rural populationb	5′	FAO (Salvatore et al., 2005)
Total populationb	2.5′	GPW (Balk and Yetman, 2004)
Cattle, sheep and goat population	0.05°	Wint and Robinson (2007)
% households connected to sewerageb	Country	Williams et al. (2012)
Sewage effluent locations and sizesb	n.a. (point data)	EEA (2012)

^aUsed for calculating river depth during the simulation of ENP transport.

^bUsed for the modeling of ENP loading from point sources.