Simulation of Surface- -water / water / Simulation of Surface - - PowerPoint PPT Presentation

Simulation of Surface Simulation of Surface-

• water /

water / Ground Ground-

• water Interaction in the

water Interaction in the Middle Rio Grande Basin Middle Rio Grande Basin

Drafted 4/12/06

• D. Michael Roark, USGS
• D. Michael Roark, USGS
• Nabil

Nabil Shafike Shafike, New Mexico Interstate Stream , New Mexico Interstate Stream Commission Commission

• Michael

Michael Gabora Gabora, New Mexico Interstate Stream , New Mexico Interstate Stream Commission Commission

Contributors Contributors

• Goal: Develop unified water operations model for the

Goal: Develop unified water operations model for the Upper Rio Grande Basin Upper Rio Grande Basin

• Common water operations tool within the Rio Grande Basin

Common water operations tool within the Rio Grande Basin to coordinate diverse entities / interests to coordinate diverse entities / interests

• Decision

Decision-

• making tool to address contemporary water

making tool to address contemporary water management needs management needs

• Capable of representing the physical, accounting, and

Capable of representing the physical, accounting, and

• perational complexities of the Rio Grande Basin
• perational complexities of the Rio Grande Basin

Goals Goals

Location of study Location of study area (map) area (map) URGWOM URGWOM Model Area Model Area

Colorado – New Mexico state line to

• Ft. Quitman, Texas
• 3 Rio Chama

reservoirs

• 3 Rio Grande main

stem reservoirs

• Several other

tributary reservoirs

Location of study Location of study area (map) area (map)

Area of Significant Area of Significant GW/ SW Interaction GW/ SW Interaction

Middle Valley - from Dam at Cochiti Lake to the upper end of Elephant Butte Reservoir Lower Valley – from Dam at Caballo Reservoir to El Paso, TX

• Current Model

Current Model

• Uses regression relations for river seepage

Uses regression relations for river seepage

• Feedback loop to correct for too much or too little water in

Feedback loop to correct for too much or too little water in river and drains river and drains

• Model needs flow input in each reach

Model needs flow input in each reach

• Many alternatives explored

Many alternatives explored

Physical Simulation Physical Simulation GW/ SW Interaction? GW/ SW Interaction?

Current techniques Current techniques

• f simulation
• f simulation

• Simulation of physical system

Simulation of physical system

• Simulation of GW/SW interaction using

Simulation of GW/SW interaction using

• RiverWare only (GW

RiverWare only (GW-

• object)
• bject)
• Dynamic interface between RiverWare and MODFLOW

Dynamic interface between RiverWare and MODFLOW

Proposed methods for Proposed methods for SW/ GW interaction SW/ GW interaction

• Using RiverWare only for simulation

Using RiverWare only for simulation

• Testing of new RiverWare Methods

Testing of new RiverWare Methods

• Testing coarse discretization

Testing coarse discretization

• Test reach chosen from gages Rio Grande below

Test reach chosen from gages Rio Grande below Cochiti to Rio Grande at Albuquerque Cochiti to Rio Grande at Albuquerque

• Complexity

Complexity

• River both loses and gains

River both loses and gains

Proof of Concept Model Proof of Concept Model

Discretization of the Discretization of the POC Model Area POC Model Area

• 1. Six GW reaches
• 2. Three areas in each

reach

• 3. Each area simulated

with a RiverWare ground-water object

Cochiti Lake Jemez Reservoir Albuquerque

Variable Head Boundaries

GW River GW East GW West

80 ft Head Dependant Flow

N

• F

l

• w

B

• u

n d a r y N

• F

l

• w

B

• u

n d a r y Percolation from Irrigation Percolation from Irrigation Heads from Regional MODFLOW Model Riverside Drain Rio Grande R i v e r s i d e D r a i n Riparian Evapotranspiration Canal Seepage

Discretization of the POC Discretization of the POC Model Area Model Area

Cochiti to San Felipe Cochiti to San Felipe part of POC Model part of POC Model

San Felipe to San Felipe to Albuquerque part of Albuquerque part of POC Model POC Model

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan 2000 500 1000 1500 2000 FLOW, IN CFS CentralGage.Inflow CentralHistoricalGage.Inflow

Preliminary Calibration River Flow at Rio Grande at Albuquerque

Probability density function of residual (historical - simulated) at Central Ave. gage for the reach San Felipe to Albuquerque, Year 2000

0.05 0.1 0.15 0.2 0.25

• 450
• 400
• 350
• 300
• 250
• 200
• 150
• 100
• 50

50 100 150 200 250 300 350 400 450 Residual (cfs) Probability 0.20 0.16 0.15 0.08 0.05 0.02 0.09 0.03 0.01 0.19 Mean Error: 7.4 cfs Absolute Mean Error: 81.7 cfs Within 100 cfs 55% of the time

Conclusions Conclusions

• Using the ground

Using the ground-

• water object, Pros and Cons

water object, Pros and Cons

• Pros:

Pros:

• Improving the physical representation of surface

Improving the physical representation of surface-

• water / ground

water / ground-

• water interaction in the middle valley.

water interaction in the middle valley.

• Simulating the impact of deep aquifer pumping on surface water.

Simulating the impact of deep aquifer pumping on surface water.

• Cons:

Cons:

• Requires more data about the physical system.

Requires more data about the physical system.

• Many more objects

Many more objects

• Continued development of simulation of middle

Continued development of simulation of middle valley valley