Geologic Framework Influence On Managing Groundwater Interference With Surface Water, A Lost River Sub-Basin Example, Upper Klamath River Basin, Oregon Gerald H. Grondin Oregon Water Resources Department Groundwater Hydrology Section Salem, Oregon
Klamath River Basin, Oregon & California Lost River Sub-Basin
Lost River Sub-Basin Irrigated Acreages: Surface Water & Groundwater
Lost River Sub-Basin Oregon Groundwater Water Right Wells
Upper Klamath River Basin Surface Hydrogeologic Units and Geologic Structure Gannett & others (2007) http://callumeatstoronto.files.wordpress.com/2012/06/satelitte-united-states.jpg
Upper Klamath River Basin Geology: Basin and Range Topography
Upper Klamath River Basin Geology: Basin-Fill Deposits
Upper Klamath River Basin Geology: Basalt/Volcanics Deposits
Lost River Sub-Basin Geologic Cross-Section
Lost River Sub-Basin Basalt & Basin-Fill Groundwater is Hydraulically Connected
Lost River Sub-Basin Deep & Shallow Groundwater is Hydraulically Connected
Lost River Sub-Basin Groundwater & Surface Water is Hydraulically Connected
Lower Lost River Sub-Basin Groundwater & Surface Water Connection: Primarily Seepage
Lower Lost River Sub-Basin Groundwater & Surface Water Connection: Primarily Seepage
Lower Lost River Sub-Basin Groundwater - Surface Water: Seepage (No Pumping)
Lower Lost River Sub-Basin Groundwater - Surface Water: Seepage (Basin-Fill Pumping)
Lower Lost River Sub-Basin Groundwater - Surface Water: Seepage (Basalt Pumping)
Lower Lost River Sub-Basin Groundwater - Surface Water Connection: Seepage Barlow & Leake (2012)
Lower Lost River Sub-Basin Groundwater - Surface Water: Seepage (Basalt Pumping) Gannett & Others (2012)
Upper Lost River Sub-Basin Groundwater & Surface Water Connection: Springs
Upper Lost River Sub-Basin Groundwater & Surface Water Connection: Springs
Upper Lost River Sub-Basin Groundwater & Surface Water Connection: Springs
Upper Lost River Sub-Basin Groundwater & Surface Water Connection: Springs
Upper Lost River Sub-Basin Groundwater & Surface Water Connection: Springs
Conclusions 1. Groundwater Occurs in Both Basin-Fill and Basalt Units 2. Groundwater in Deep vs. Shallow Water-Bearing Zones is Connected 3. Groundwater & Surface Water are Connected: Seepage & Springs 4. Groundwater Pumping Causes Surface Water Depletion 5. Depletion Seasonal Magnitude & Duration Varies a. Depletion via Springs is More Acute than via Seepage b. Depletion is Less Acute with Distance c. Depletion is Less Acute with Greater Well Seal Depth 6. Depletion Total Volume Remains the Same Over Time
Water Resource Management Consideration 1. Recognize & Decide a. Recognize Total Depletion Volume Over Time Remains the Same b. Recognize Maximum Rate & Duration of Depletion Can Vary c. Decide What to Manage 2. Managing Acuteness of Depletion Rate & Duration a. Continuous Well Casing & Seal Through Basin-Fill Into Basalt b. Greater Distance Between Wells & Surface Water c. Avoid Depletion via Springs as Much as Possible 3. Managing Depletion Maximum Rate & Volume a. Determine Maximum Monthly Depletion Acceptable b. Determine Maximum Monthly GW Pumping Rate Acceptable c. Determine Maximum Annual GW Pumping Volume Acceptable
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