[ Aquifer Properties ] [ Land Surface Topography ] [ Water Table ] [ River Info ] [ Soils ] [ Land Use ] [ Weather ] [ Pumpage/Recharge ] [ Groundwater Pumping ] [ Groundwater Recharge ] [ Aquifer Test Data ] [ Streamflow Gain/Loss ] [ Photo Gallery ] [ Archive ] | ||
| Preliminary Data and Reports | ||
| Base Coverage | ||
 COHYST boundary |
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| Natural Resources District Boundaries |
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| County Boundary |
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| Section Polygons Coverage |
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| Section Corners (SE corner of each section) |
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| Roads |
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| Quadrangle Polygons Coverage |
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| Documentation | ||
| Planning and Strategic Documents |
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| Board of Directors Meeting Minutes |
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| 40-year, 28% Depletion Lines DNR (Adobe) |
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| PowerPoint Presentation for 40-year, 28% Depletion Lines DNR |
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| Simulated Baseflow Changes from Reducing Irrigated Acres after July 1, 1997 |
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| Estimated Stream Depletion in Nebraska Platte Basin after July 1,1997 New Irrigated Acres |
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| Hydrostratigraphic Unit & Aquifer Characterization Report 02/24/2006 |
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| Eastern Model Unit |
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Download | Support Data |
| Central Model Unit |
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| Western Model Unit |
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| General Information | ||
| Naming Convention for COHYST's data |
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| Groundwater Model for COHYST |
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| Geology | ||
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Testhole Database (Access) Values are currently being modified (01/05). |
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Testhole digital coverage for COHYST area. Values are currently being modified (01/05) |
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Contour Bottom Layers coverage for COHYST area. (03/2010) |
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Present Bottom Layers coverage for COHYST area. (03/2010) |
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Thickness Bottom Layers coverage for COHYST area. (11/2006) |
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Bedrock-University of Nebraska, Conservation & Survey Division (CSD) |
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Parent material- A simplification of STATSGO soils based on an index developed
by UNL's CSD soil scientists |
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Soil Classification- Simplification of STATSGO soils for slope and texture.
Created by UNL-CSD |
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| Streambed Hydraulics | ||
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Polygon coverage of river sections examined |
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Arc coverage defining segments of known slope from "Facts and Figures about
Nebraska Rivers" (Bentall, 1991) |
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Point coverages of graditional trend with the trends being either 'degrading'
or 'none' from the 1999 USGS Trend Analysis Report |
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Point coverage of median bed material size (mm) from 1981 Kircher report,
"Interpretation of Sediment Data.." |
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Streambed coring results. |
Download | Metadata |
| Streambed Permeameter |
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| Aquifer Properties | ||
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USGS Hydraulic Conductivity Coverage - High Plains Aquifer. |
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USGS Specific Yield Coverage - High Plains Aquifer |
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USGS Base of Aquifer Coverage - High Plains Aquifer |
Download | Metadata |
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USGS Extent of High Plains Aquifer |
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USGS Geologic Faults - High Plains Aquifer |
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USGS Areas with Little or No Saturated Thickness - High Plains Aquifer |
Download | Metadata |
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USGS 1980 Saturated Thickness - High Plains Aquifer |
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K & SY Database (ACCESS) Modified (01/05) |
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K & SY Testhole point coverage. Modified (01/05) |
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Hydrualic Conductivity polygon coverage. Modified (11/06) |
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| Land Surface Topography | ||
| Topographic Regions in Nebraska - from Conservation Survey Division (CSD) 1951 1:1,000,000 scale maps |
Download | Metadata |
| Nebraska Groundwater Regions |
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| Shaded Relief Map of COHYST Extended Study Area (tif format) |
Download | Metadata |
| Shaded Relief Map of COHYST Extended Study Area (jpg format) |
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| ET Surface of COHYST Study Area(asciiformat) |
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| Water Table Information | ||
| 1995 Water Table Contour from University of Nebraska, Conservation & Survey Division |
Download | Additional Information |
| 1995 Water Table ASCII Grid for COHYST Study Area |
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| Depth to Water Polygon Coverage from University of Nebraska, Conservation & Survey Division |
Download | Metadata |
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CSD Pre-development Water Table 1979 |
Download | Metadata |
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USGS Pre-development Water Levels - High Plains Aquifer |
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USGS Changes in Water Level: Pre-development to 1980 - High Plains Aquifer |
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USGS Changes in Water Level: 1980-1994 - High Plains Aquifer |
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USGS Changes in Water Level: 1980-1995 - High Plains Aquifer |
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USGS Changes in Water Level: 1980-1996 - High Plains Aquifer |
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| River Information | ||
| Streams used in COHYST Model |
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| Surface Water Gaging Sites |
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| Detailed Streams by River Basin Digitized from 7�-Minute Quads |
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| Hydrologic Unit Boundaries by River Basin |
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| 1:100,000 Scale Lakes |
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| 1998 Stream Station Location |
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| 1998 US National Climatic Center Streamflow Station Location Database |
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| 1982 Missouri Basin States Association
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Download | Tech Paper |
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Download | Tech Paper |
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| Soils | ||
| State Soil Survey Geographic Data Base (STATSGO) Modified by Dr. Martin UNL |
Download | Metadata |
| State Soil Survey Geographic Data Base (STATSGO) |
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| Land Use & Irrigation | ||
| COHYST Land Use Mapping 2005 2001 1997 1982 by CALMIT |
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| Delineation of landuse patterns in COHYST area using 1997 Thematic Mapper imagery |
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| Evaluation of Historic Landuse - Clint Carney - NPPD |
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| Graphical compilation of Crop Irrigation Data within COHYST - Clint Carney - NPPD |
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| Quick Stats - Nebraska Dept of Agriculture Statistics |
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| Weather | ||
| US National Climatic Center |
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| Nebraska Climate Divisions Map |
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| 1961-1990 Nebraska Average Annual Precipitation (PRISM) |
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| Lake Evaporation 1946-1955 (Nebraska) |
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| Pumpage/Recharge | ||
| Weather Station Location |
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| Distribution Polygon |
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| Flowchart of Inputs, Outputs & Processes |
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| Groundwater Pumping | ||
| Monitor Wells in the Central Platte NRD |
Download | Metadata |
| Monitor Wells in the North Platte NRD |
Download | Metadata |
| Monitor Wells in the South Platte NRD |
Download | Metadata |
| Monitor Wells in the Tri-Basin NRD |
Download | Metadata |
| Monitor Wells in the Twin Platte NRD |
Download | Metadata |
| Monitor Wells in the Upper Big Blue NRD |
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| Registered Wells |
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| Groundwater Recharge | ||
| PRELIMINARY COHYST modified STATSGO coverage based on work done by Dr Derrel L. Martin of UNL and historic work of Jack Dugan. |
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| PRELIMINARY Theissen polygons of weather stations used by Dr Derrel L. Martin of UNL. |
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| Tributaries drains and canals in the Central Platte NRD |
Download | Metadata |
| Tributaries drains and canals in the North Platte NRD |
Download | Metadata |
| Tributaries drains and canals in the Tri-Basin NRD |
Download | Metadata |
| Tributaries drains and canals in the Twin Platte NRD |
Download | Metadata |
| Tributaries drains and canals in the South Platte NRD |
Download | Metadata |
| Gaining Reaches in Upper Big Blue NRD |
Download | Metadata |
| Canals, Laterals and Drains in the Central Nebraska Public Power and Irrigation District (CNPPID) |
Download | Metadata |
| Canals, Laterals and Drains in the Nebraska Public Power District (NPPD) |
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| Aquifer Test Data | ||
| No available data yet |
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| Streamflow Gain/Loss | ||
| Streamflow gain/loss in the Republican River Basin, Nebraska |
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| Platte River Cooperative Hydrology Study | ||
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