The Australian Hydrological Geospatial Fabric (Geofabric) tutorial series has expanded, with a further two tutorials now available. The Geofabric is a specialised Geographic Information System. It registers the spatial relationships between important hydrological features such as rivers, water bodies, aquifers … Continue reading
By Lori Armstrong
The World Water Online (WWO) group in the ArcGIS Resource Center has 12 new web map applications based on the SSURGO soil survey database. These apps show soil characteristics that are useful for hydrologic modeling, such as drainage class, available water storage, water table depth, and ponding frequency. The hydrologic group code, which classifies soils based on infiltration rate, can be used to calculate curve number and model how much rain falling in an area will become runoff.
by David Northup, GIS Analyst, Integrated Spatial Solutions Inc. (ISSI) The modeling application was designed for a hydroelectric power production system in CA. The system is located in the central Sierra Nevada Mountains, and is comprised of 6 major reservoirs, … Continue reading
by Michael Dangermond, Senior Digital Cartographer, Esri
The Soil Hydrology of the United States Web Map Application brings some of the most important hydrologic soil properties together in one map. Find hydrologic group codes for hydrologic and hydraulic models. Find hydric soil information to determine wetland land classification. Find depth to the water table for groundwater analysis and well drilling operations.
by Stephen Brown, Graduate Research Assistant, Dept. of Civil Engineering, University of New Mexico
Hydrologic data analysis frequently begins with a tedious march through the gauntlet of national data repositories, downloading data gage-by-gage until you have acceptable coverage for your region. The march continues as you homogenize the gage data to match locally collected values in an attempt to identify trends or simply graph the values for comparison. A majority of research time may be spent simply conducting data discovery and management.
Incorporating a Hydrologic Information System into your workflow can save you time and increase analysis opportunities. The Consortium of Universities for Advancement of Hydrologic Science, Inc. (CUAHSI) has developed an open source Hydrologic Information System (HIS) specifically to aid researchers with data discovery, analysis, and management.