Columbia River Off-Channel Aquifer Storage Project

Transcription

1 Columbia River Off-Channel Aquifer Storage Project Bruce Williams GeoEngineers, Inc. Guy Gregory Washington State Department of Ecology AWRA November 15, 2016

2 Water Storage Solutions Required by Legislature RCW ; Finding. (1) The legislature finds that a key priority of water resource management in the Columbia river basin is the development of new water supplies that includes storage and conservation in order to meet the economic and community development needs of people and the instream flow needs of fish.

3 The Eastern WA Water Supply Situation Supply (streamflow and precipitation) Water Use (demand) J F M A M J J A S O N D Winter Spring Summer Fall

4 The Search for Columbia Basin Storage 2005 Surface Storage Study Siting surface water reservoirs is problematic

5 Rilette Project Area Location Study Area

6 ASR = Aquifer Storage and Recovery Injection Storage Extraction

7 ASR Potential Benefits GENERAL ASR BENEFITS Environmental No change in land use Cost effective Proven technology Large storage capacity RILETTE SPECIFIC BENEFITS No impairment of water rights Publically-owned land Large water source Columbia High head and low volume No impact to power supply Upstream of major water demand

8 Physical and Hydrologic Setting Semi-arid climate Topographic isolation Little groundwater use Not served by imported water from the Columbia Basin Irrigation Project Existing rural land use

9 Rilette Project Area

10 Characteristic Cross-Section

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16 Basalt Unit Potentiometric Wanapum Basalt Apparent gradient toward west-southwest at 16 ft/mi Grande Ronde Basalt Apparent gradient toward southeast at 70 ft/mi

17 Aquifer Testing Results Pumping from Grande Ronde resulted in no drawdown in the Wanapum Basalt Nearby observation wells in the Grande Ronde respond to pumping tests. Distant wells variably respond. Moderate transmissivity and relatively high storativity for Grande Ronde Aquifer water levels generally do not fully recover after pumping Discharge for 72-hour Aquifer Test at 250 gpm

18 Constant-rate Test Water Levels in MW (b) MW-1: Constant-rate Test Groundwater Elevation (ft NAVD88) Pre-test 2130 Constant-rate Test Recovery Manual Apr 23-Apr 24-Apr 25-Apr 26-Apr 27-Apr 28-Apr 29-Apr 30-Apr 1-May

19 Monitoring Well Drawdown Analysis 100 Log-Log Drawdown with Derivatives: MW-1 MW-1 Data Moench Type Curve MW-1 MW-1 Derivative MW-1 Derivative Type Curve Drawdown, s (ft) 10 1 T = ft²/day S = Elapsed Time, t (mins)

20 Test Well Drawdown Analysis 100 Log-Log Drawdown with Derivatives: Test Well Corrected Drawdown, s (ft) TW-1 Data Moench Type Curve TW-1 TW-1 Derivative TW-1 Derivative Type Curve Elapsed Time, t (mins)

21 Recovery Analysis 20 Recovery Plot: Time Ratio Method (after Theis) Theis Method: Residual Drawdown, s' (ft) T = 264 (Q) Δs T = 264 (250 gpm) 8.35 ft/cycle T = 7,900 gpd/ft T = 1,057 ft 2 /day Recovery Data TW-1 Recovery Data MW-1 Moench Type Curve TW-1 Moench Type Curve MW-1 0 Theis Type Curve TW-1 Theis Type Curve MW Time Ratio, t/t' (mins/mins)

22 Well Testing Results- Constant Rate Testing Well Location Specific Capacity (gpm/ft) Bulk Effective Transmissivity (ft2/day) Storativity (unitless) Eastern Test Well Locations TW E-04 TW E-04 Western Test Well Locations TW E-04 TW E-03 TW E-04 TW-5D E-04 TW E-04 TW E-04 TW E-03 TW E-05 TW E-02

23 Long-term Water Level Monitoring

24 Potential Pumped Storage Integration From: Witt and others, ORNL/TM-2015/559

25 Pearl Hill Hydro Battery Project From: SENA, AF storage 1310 ft. head above generation 5MW capacity Primary purpose: Grid Balancing facility FERC PAD filed 9/28/2016

26 Rilette Project Area Test Well Test Well

27 Increased balancing = increased capacity for renewables in the grid

28 Project Conclusions and Potential Results Potential for regional-scale off-channel ASR exists at Rilette Existing empirical testing indicates the ability to store significant amounts of winter water Addressing dry season in-stream and out-of-stream demands in the Columbia River system Potential exists for integration with grid-balancing and hydropower facilities Increasing the viability of renewable energy resource And, potentially offsetting some costs and constraints on water clients Preliminary feasibility analysis due Q1 2017

29 Questions? Bruce Williams GeoEngineers, Inc. Spokane, WA Guy Gregory Washington State Dept. of Ecology Spokane, WA