use of GIS to assess groundwater recharge in the Texas High Plains

1
use of GIS to assess groundwater recharge in the
Texas High Plains

• Sarah Davidson
• GIS in Water Resources
• Dr. David Maidment
• November 29, 2007

2
hypothesis

• Generally available spatial datasets can be
  used with ArcGIS to estimate the spatial
  distribution of groundwater recharge rates.

3
research needs

• methods for
• estimating groundwater recharge
• characterizing groundwater systems in data-poor
  areas
• linking land and water management

4
recharge in the High Plains

• controlled by
• topography
• soils
• vegetation
• climate
• land use

R P I - E - T - Ro
5
topography

• 10-meter National Elevation Dataset (DEMs)

6
vegetation
National Agricultural Imagery Program (NAIP)
7
soils
Soil Survey Spatial and Tabular Data (SSURGO)
8
climate
National Climatic Data Center (NCDC)
9
land use
National Land Cover Dataset (NCDC)
10
future work

• integrate point recharge estimates
• calculate recharge volume
• incorporate temporal variabilityand vadose zone
  thickness

11
Thanks!