Title: How the System Works Where the Water Comes From and Where It Goes
1How the System WorksWhere the Water Comes From
and Where It Goes
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3The South Platte River Basin
TransbasinDiversions 1. Adams Tunnel 231,060
af 2. Roberts Tunnel 68,767 af 3. Moffat
Tunnel 52,912 af
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5Population
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7Land Uses
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12Historically intermittent, the South Platte is
today a perennial river, with a much more
predictable flow than 130 years ago. (Silkensen
1992)
13The practice of irrigation, including the use of
extended distribution systems, has created
conditions which not only tend to
maintain a constant return flow, but have
apparently increased the rivers discharge ...
(Ralph Parshall, 1922)
CDOW Fish Sampling Photo June 15, 1994, near Crook
14Relationship between Groundwater and Surface Water
15Groundwater in the Lower South Platte
Main source is the Valley Fill aquifer. Which is
an alluvial aquifer made up of clay, sand and
gravel. Groundwater in the alluvium is in close
hydrologic connection with surface water in the
South Platte River.
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21Calculating Depletions Met by Groundwater
22Depletions
23Total Annual Depletions
24Calculating Depletions Met by Groundwater
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26Depletions 1,741 AF
Depletions 1,741 AF
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28Depletions 1,741 AF
Depletions after 5 yrs 1,490 AF 10 yrs 1646 AF
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30Depletions 1,741 AF
Depletions after 5 yrs 1,025 AF 10 yrs 1,409 AF
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32Depletions 1,741 AF
Depletions after 5 yrs 645 AF 10 yrs
1,148 AF
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34Impact of a Recharge Pond
35How Groundwater Recharge for Stream Augmentation
Works
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37Depletions 1,741 AF Recharge 1,665 AF
5 YRS Depletions 1,490 AF Recharge
1,460 AF
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39Well at SDF 30 and Recharge Pond at SDF 300
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41Depletions 1,741 AF Recharge 1,665 AF
5 YRS Depletions 1,490 AF Recharge
1,068 AF
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43Well and Recharge Pond at SDF 1000
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45Depletions 1,741 AF Recharge 1,665 AF
5 YRS Depletions 645 AF Recharge
691 AF
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47Management Tools
48SPMAP History
- Colorado Water Resources Research Institute
provided seed funding in 1995 to work withlocal
water user groups to address their data and tool
development needs in the Lower South Platte River
Basin from below Denver to the state border. - In order to accomplish this we established an
advisory committee.
49The South Platte Advisory Committee
- The South Platte Advisory Committee is
comprised of representatives from water user
groups in the South Platte including - Central
- Northern
- SPLRG
- GASP
- Lower
- State Engineers Office
- CWRRI
50User Centered DSS Development
- SPMAP Approach
- User needs should drive the development of the
DSS. - Develop a dynamic and collaborative process.
- Work with a group of users and develop a set of
needs and priorities. - Develop prototypes for quick turn around and work
cooperatively with users.
51SPMAP-History
- Committee determined that what they needed was
- A process to easily and efficiently compute water
use and augmentation requirements (which included
data and models).
52SPMAP Components
- South Platte Geographic Information Systems
(SPGIS) - South Platte Consumptive Use Model (SPCU)
- Stream Depletion Factors Model (SDFView)
- NEW
- Habitat Potential Assessment Tool (HPAT)
- Recharge Potential Assessment Tool (RPAT)
53SPGIS
- Geographic Information Systems area
computerized database management system for
capture, storage, retrieval, analysis, and
display of spatial (locationally defined) data.
(National Science Foundation) - GIS coverages include maps and tables of
associated data, as well as images(e.g.
satellite photography)
54SPGIS Software
- SPGIS runs in ArcView.
- Additional tools were created to update and
customize these maps for modeling. - Well Tools is an extension developed for this
project.
55SPGIS
56South Platte CU Model (SPCU)
- Based on surface water supplies and consumptive
use estimates, users can estimate the CU met by
groundwater and can transfer this information to
SDFView to determine the depletions and/or
accretions to the river.
57Preparing a CU ModelInput File Using SPGIS
- The user selects fields from an irrigated acreage
theme and assigns crop types and application
efficiencies. - Fields are then grouped into farms. Any wells
that serve the farm are added. - Well attributes such as stream depletion factor
and the portion of the farm served can be
assigned.
58Preparing a CU Input File from a Database
- The user can use either Access or dBase.
- The user maps the fields in the database to
corresponding model data.
59- Surface water supplies can be assigned to a farm
either from HydroBase or by the user.
60Main SPCU Window
61Building Scenarios
- Scenarios can be created for forecasting
consumptive use. - Scenarios can be created using any sequence of
historical data.
62- The model can calculate CU of groundwater. If
the user supplies pumping records, the model can
calculate application efficiencies of wells.
63- Recharge from ditch conveyance loss and well loss
can be calculated.
64- Consumptive use for each farm is displayed in a
spreadsheet.
65 66SPCU Links to SDFView
- Groundwater consumptive use from the SPCU Model
can be fed into SDFView.
67SDFView Calculating Stream Depletion and
Augmentation Requirements
68South Platte SDF Model
- Based on surface water supplies and consumptive
use estimates, managers are able to estimate
groundwater use for individual wells. - This information can be used to determine the
timing and location of out-of-priority depletions
to the river, and therefore be able to
efficiently and cost effectively determine
augmentation requirements.
69Main SDF Window
70SDFView Scenarios
- SDFView can use pumping and recharge information
from the SPCU Model. - A sequence of years can be run to generate
estimates of future pumping or recharge.
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73SPMAP
- A version of all three components of the system
have been developed and distributed to all
participants. - SPGIS, SPCU and SDF View are distributed via the
web www.ids.colostate.edu/projects/sdfview - www.ids.colostate.edu/projects/spcu
- www.ids.colostate.edu/projects/spgis
74New SPMAP Tools Habitat Potential Assessment Tool
- Recharge ponds can be designed to provide
habitat, especially for migratory waterfowl - Habitat partnership programs
- - Partners for Fish and Wildlife- Ducks
Unlimited- NRCS Wetlands Reserve Program
75New SPMAP Tools Habitat Potential Assessment Tool
Snow Geese over Bill Condons Ponds (Crook)
76New SPMAP Tools Habitat Potential Assessment Tool
- Considers proximity to other habitat types
- New coverages include
- Recharge ponds
- State Wildlife Areas
- CDOW Riparian Vegetation Data
- Existing project sites (PFW, DU, NRCS)
- Soil Maps
- Colorado Natural Heritage Program Element
Occurrences and Potential Conservation Areas
77New SPMAP Tools Habitat Potential Assessment Tool
78New SPMAP Tools Habitat Potential Assessment Tool
79New SPMAP Tools Habitat Potential Assessment Tool
- Needed to assess sites for potential to develop
recharge ponds - Considers potential water sources (distance,
uphill or downhill), soil type, and SDF - A site visit would be needed to confirm
assessment findings
80New SPMAP Tools Recharge Potential Assessment
Tool
81New SPMAP Tools Recharge Potential Assessment
Tool
82Other useful data and tools include
- Hydrobase (SEO)
- Augmentation/Recharge Accounting (NCWCD)
- South Platte Decision Support System (SPDSS)
(SEO/CWCB)
83Questions?