Transcript RGDSS Update - Colorado Division of Water Resources

Decision Support
May 2011
DSS components
• Hydrobase
• GIS data
• TStool/CDSS tool box
• StateCU
• StatePP
• Modflow.
HydroBase
TSTool &
StateDMI
GIS Data (Spatial Data)
CDSS Tool Box &
StateDGI
StateCU
MODFLOW
Decision Support Process
RGDSS GROUNDWATER MODEL WORKSHOP
JANUARY 10-12, 2011
PROCESS/DATA FLOW DIAGRAM
GIS DATA (Spatial Data) – ARCVIEW
HYDROBASE
Basic Water Data
Ditch Service Areas
Rim Inflow Areas
Climate Stations
Sprinklers (1975-98)
Diversions/Structures
Water Rights
Well Info
Climate Data
Irrigated Parcels
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County, HUC
Land Use
Aerial & Satellite Imagery
Drains
Diversions
Model Grid/Layers
Soils
Stream Gages GW Only Area Boundaries
Wells/Irrigated Lands (1936, 1998, 2002, 2005)
SCALE: Parcel Time Frame: Variable
STATECU PROGRAM
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TSTOOL/STATEDMI
Tools for downloading and enhancing
data from HydroBase
User/GIS generated lists provide input
files
INPUT: RCU file + other files created by DMI’s
OUTPUT File (*.DWB):
Canal Losses
Non-Consumed SW & GW
Effective Precipitation
GW Pumping for irrigation
Ditch Shortage of subirrigation
IWR for crop subirrigation
SCALE: Ditch /Structure
TIME FRAME: Model Period
TIME STEP: Monthly
RUNS: Historic
No Pumping
Mkrcdwb: Program that creates 3rd dwb file
needed for simulating the recharge decrees
M&I Well Pumping and
Recharge Command Files
Plus
Rim Recharge Command File
Stream Package
Major Programs
Mkstr: Reads GIS coverage and
creates initial network
Mkq: Prepares flow files for each
stress period
Build: Performs data integration
MODEx: Produces MODFLOW
stream package
MODFATE
Iterative program
that estimates
fate of surface
water return and
drain flows
CDSS TOOL BOX & STATEDGI
INPUT: GIS Files
OUTPUT: Canal Length
Irrigated acreage by ditch
Irrigation wells
Irrigated crop for subirrigation
Wells assigned to cells/layers
Small flowing wells assigned to cells
Rim Inflow Areas assigned to cells
Native Vegetation areas
Available Water Content
SCALE: Parcel/Structure/Model Cell
Time Frame: Snapshots (1936, 1998, 2002, 2005)
RUNS: One run for each of the snapshot years
STATEPP – Modified for RGDSS
INPUT: StateCU, StateDGI, AGG, and PRISM
OUTPUT: MODFLOW Recharge Packages
MODFLOW ET Packages
MODFLOW Well Packages
MODFLOW Drain Packages
SCALE: Model Cell
Time Frame: Model Period
Time Step: Monthly
RUNS: Historic
No Pumping
Recharge Decrees
mksub
Program that builds Subdistrict input
files, one for each Subdistrict
AGG
Aggregates individual ditches
to make the MS and ADW
structures
PRISM
PRISM Climate Group, Oregon
State University,
http://www.prismclimate.org,
created 4 Feb 2004
General Input Files
NAM File – Names all input files
BAS Package - General Setup
BCF Package – Aquifer Parameters
DIS Package – Discretization
GHB Package – Boundaries
HFB (Horizontal Flow Barrier) Package – Mesita Fault
OC Package- Output Control
Solver Package
MODFLOW
Subdistrict Response Function Runs
1. No Pumping Run: 1970 -2009 (includes recharge decrees )
2. Historic Response Calibration Data: Transient Historical Run minus No Pumping Run (1970-2009)
3. Annual Response Functions (1988 – 2009) used to derive calibrated Wet, Dry and Average Year
Response Functions.
4. Wet, Dry and Average year responses are combined and adjusted to “calibrate” to the Historic
Response Calibration Data.
5. Calibrated Wet, Dry and Average year response functions used to estimate future pumping
impacts.
Historic Runs
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Steady State: 1990-1998
Steady State: Average Monthly
Initial Period: Steady State 19501969
Transient: 1970-2009
Refinements
• New Data
– Aerial imagery
– Pumping information
– Cropping information
– Geological information
– Water User information
• Commitment to continue to refine the model
• Phase 4, phase 5, phase 6
Imagery
• Original data
– 1998 satellite imagery (3)
• New data
– 1998 imagery (~27)
– 2002
– 2005
– More images at better resolution
– Used to refine GIS layers
Illustrative Example
Illustrative example only. Not from RGDSS modeling effort.
Well/Meter Records
• Incorporated 2009 pumping data
• Reviewed well meter data and other information to assure that
pumping from all non-exempt wells within the model domain are
included in the model.
• Refinements to structure lists and multi-structure groupings
• Enhanced methodology to estimate historic pumping that takes into
account subirrigaton and regional irrigation practices obtained
through interviews with water users and water commissioners
• Refinements to municipal and industrial well pumping estimates
Cropping
•
Conducted a series of water user and water commissioner interviews to enhance
ditch service area representation, well to parcel assignments and local irrigation
practices.
•
1998 Irrigated Lands Assessment completed under the same standards utilized
from the 2002 and 2005 Irrigated Lands Assessments
•
Additional investigation of the extent of meadow/grass pasture actually irrigated
•
Added new crop types: cover crops and new alfalfa
•
Revisited some crop characteristics, such as planting date and freeze dates, based
on water user interviews and recommendations based on Agro Engineering’s
experience.
•
Refine subirrigation curves based on additional research
Geology/Hydrogeology
• investigated the locations of high groundwater
tables during irrigation season based on the
RGWCD’s water level measurement database
• review all existing well log records for the
Conejos/Rio San Antonio area and update the
geological parameters of the model based on
that review by HRS Water Consultants, Inc.
User Information
• User experience
– In meetings
– On the ground
• Updated some canal conveyance efficiencies
based on revised canal coverage and
interviews with water users and water
commissioners
• Farm operations
General
• “study period” extended through 2009
• refined climate station weights based on local climate
information
• refinements to diversion records for structures carrying or
receiving water to or from other structures
• update stream inflow and recharge areas with current data
• refinements to stream and drain packages based on GPS
data location and additional mapping