. Author manuscript; available in PMC: 2022 Jan 1.

Published in final edited form as: Ecol Indic. 2021 Jan 1;122:10.1016/j.ecolind.2020.107241. doi: 10.1016/j.ecolind.2020.107241

Table 1.

Dam and landscape variables in the HydrAP decision tree.

Variable	Description	Source
Dam/Z_max	Ratio of dam height and maximum lake depth at approximate full pool	Dam: National Anthropogenic Barrier Database (NABD) (Cooper et al. 2017) Lake depth: NLA and online lake records
Ag+Urb Ws	Aggregated land use classes summing total agriculture and urban development class proportions in the lake watershed (Ws)	USGS National Land Cover Database (NLCD) 2006, 2011
Irrig Ag Adj	Estimated extent of irrigated agriculture based on satellite-derived estimates of vegetative vigor, NLCD land cover, and US Dept. of Agriculture irrigation statistics. Proportion is estimated in the lake adjacent direct drainage area (Adj)	Brown and Pervez 2014
Ag Drain Adj	Estimated artificial drainage on agricultural lands based on soil drainage (SSURGO), crop productivity surveys (US Dept. of Agriculture), and NLCD land cover. Proportion is estimated in the lake adjacent direct drainage area (Adj)	Christensen et al. 2013; Vanderhoof et al. 2017
Urb Adj	Proportions of total urban development classes in the lake direct drainage area (Adj)	USGS National Land Cover Database (NLCD) 2006, 2011
Topographic relief	Difference in maximum elevation in the watershed and lake elevation	USGS National Elevation Dataset