Mean annual water-budget components for the Island of Maui, Hawaii, for average climate conditions, 1978-2007 rainfall and 2010 land cover (version 2.0)

The shapefile associated with this metadata file represents the spatial distribution of mean annual water-budget components, in inches, for the Island of Maui, Hawaii. The water-budget components in the shapefile were computed by a water-budget model for a scenario representative of average climate conditions (1978–2007 rainfall) and 2010 land cover, as described in USGS SIR 2014-5168. The model was developed for estimating groundwater recharge and other water-budget components for each subarea of the model. The model subareas were generated using Esri ArcGIS software by intersecting (merging) multiple spatial data sets that characterize the spatial distribution of rainfall, fog interception, irrigation, reference evapotranspiration, direct runoff, soil type, and land cover. This metadata file describes the process of merging these spatial data sets into 318,429 model subareas, which are represented by the polygons in the shapefile. These spatial data sets characterize the spatial distribution of hydrologic and physical conditions that the model uses to compute groundwater recharge and other water-budget components. The shapefile attribute information associated with each polygon present an estimate of mean annual rainfall, fog interception, septic-system leachate, runoff, canopy evaporation, net precipitation, total evapotranspiration, recharge, and seepage from reservoirs and cesspools. This shapefile also includes select geographic and land-cover attributes of the model subareas. Brief descriptions of the water-budget components and attributes are included in this metadata file. Refer to USGS SIR 2014-5168 for further details of the methods and sources used to determine these components and attributes.