use of gis to assess groundwater recharge in the texas high plains
Post on 15-Jan-2016
34 Views
Preview:
DESCRIPTION
TRANSCRIPT
use of GIS to assess groundwater recharge in the Texas High Plains
Sarah Davidson
GIS in Water Resources
Dr. David Maidment
November 29, 2007
hypothesis
Generally available spatial datasets can be used with ArcGIS to estimate the spatial distribution of groundwater recharge rates.
research needs
methods for• estimating groundwater recharge• characterizing groundwater systems in
data-poor areas• linking land and water management
recharge in the High Plains
R = P + I - E - T - Ro
controlled by• topography• soils• vegetation• climate• land use
topography
10-meter National Elevation Dataset (DEMs)
vegetation
National Agricultural Imagery Program (NAIP)
soils
Soil Survey Spatial and Tabular Data (SSURGO)
climate
National Climatic Data Center (NCDC)
land use
National Land Cover Dataset (NCDC)
future work
integrate point recharge estimates
calculate recharge volume
incorporate temporal variability
and vadose zone thickness
Thanks!
top related