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Borrego Valley Groundwater Basin Borrego Springs Subbasin Draft - - PowerPoint PPT Presentation
Borrego Valley Groundwater Basin Borrego Springs Subbasin Draft - - PowerPoint PPT Presentation
DRAFT WORK PRODUCT Borrego Valley Groundwater Basin Borrego Springs Subbasin Draft Fall 2017 Groundwater Monitoring Results Borrego Valley Groundwater Basin Sustainability Plan Advisory Committee Meeting January 25, 2018 2 Groundwater
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North Management Area: Groundwater Elevation
370 375 380 385 390 395 400 405 410 415 420 2000 2005 2010 2015 2020
Groundwater Elevation, in feet above NAVD 88 Date
MW-1
360 380 400 420 440 460 480 1980 1985 1990 1995 2000 2005 2010 2015 2020
Groundwater Elevation, in feet above NAVD 88 Date
ID4-3 Trend = -2.52 feet per year Trend = -3 feet per year
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Central Management Area: Groundwater Elevation
380 390 400 410 420 430 440 450 460 470 480
1980 1985 1990 1995 2000 2005 2010 2015 2020
Groundwater Elevation, in feet above NAVD 88
Date
ID4-1
Trend = -1.85 feet per year
400 410 420 430 440 450 460 470 480 490 500
1950 1955 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020
Groundwater Elevation, in feet above NAVD 88 Date
Airport 2
Trend = -1.17 feet per year
380 390 400 410 420 430 440 450
1990 1995 2000 2005 2010 2015 2020
Groundwater Elevation, in feet above NAVD 88 Date
ID1-16 Trend = -1.63 feet per year
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South Management Area: Groundwater Elevation
408 410 412 414 416 418 2005 2010 2015 2020
Groundwater Elevation, in feet above NAVD 88
Date
MW-5A Trend = -0.65 feet per year
450 455 460 465 470 475 480 2001 2004 2006 2009 2012 2014 2017 2020
Groundwater Elevation, in feet above NAVD 88
Date
MW-3 Trend = +1.34 feet per year Trend = -7.15 feet per year
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Subbasin Groundwater Elevation Contour Map
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Working Draft – For Discussion Purposes Only
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Groundwater Elevation Monitoring Network
7 Number of wells monitored: 30
North Management Area: 6 wells Central Management Area: 9 wells South Management Area: 15 wells
Monitored For:
- Arsenic
- Fluoride
- Radionuclides (gross alpha particle activity)
- Nitrate (as Nitrogen)
- Sulfate
- Total dissolved solids (TDS)
General Minerals
Cations
- Calcium
- Magnesium
- Potassium
- Sodium
- Total hardness
Anions
- Bicarbonate
- Carbonate
- Chloride
- Hydroxide
- Total alkalinity
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North Management Area: Arsenic
NT Decrease from last sample Increase from last sample No change from last sample Decreasing trend Increasing trend No trend NT
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ND – Non-detect NS – No Sample
Well Screen
U – Upper Aquifer M – Middle Aquifer L – Lower Aquifer
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Central Management Area: Arsenic
NT NT NT NT Decrease from last sample Increase from last sample No change from last sample Decreasing trend Increasing trend No trend
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ND – Non-detect NS – No Sample
Well Screen
U – Upper Aquifer M – Middle Aquifer L – Lower Aquifer
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South Management Area: Arsenic
Decrease from last sample Increase from last sample No change from last sample Decreasing trend Increasing trend No trend NT
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ND – Non-detect NS – No Sample
Well Screen
U – Upper Aquifer M – Middle Aquifer L – Lower Aquifer
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North Management Area: Nitrate
Decrease from last sample Increase from last sample No change from last sample Decreasing trend Increasing trend No trend NT
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ND – Non-detect NS – No Sample
Well Screen
U – Upper Aquifer M – Middle Aquifer L – Lower Aquifer
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Central Management Area: Nitrate
NT NT Decrease from last sample Increase from last sample No change from last sample Decreasing trend Increasing trend No trend NT
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ND – Non-detect NS – No Sample
Well Screen
U – Upper Aquifer M – Middle Aquifer L – Lower Aquifer
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South Management Area: Nitrate
NT NT Decrease from last sample Increase from last sample No change from last sample Decreasing trend Increasing trend No trend NT
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ND – Non-detect NS – No Sample
Well Screen
U – Upper Aquifer M – Middle Aquifer L – Lower Aquifer
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North Management Area: Sulfate
NT Decrease from last sample Increase from last sample No change from last sample Decreasing trend Increasing trend No trend NT
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ND – Non-detect NS – No Sample
Well Screen
U – Upper Aquifer M – Middle Aquifer L – Lower Aquifer Sulfate MCL is the upper limit of the secondary MCL
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Central Management Area: Sulfate
NT NT NT Decrease from last sample Increase from last sample No change from last sample Decreasing trend Increasing trend No trend NT
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ND – Non-detect NS – No Sample
Well Screen
U – Upper Aquifer M – Middle Aquifer L – Lower Aquifer Sulfate MCL is the upper limit of the secondary MCL
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South Management Area: Sulfate
Decrease from last sample Increase from last sample No change from last sample Decreasing trend Increasing trend No trend NT
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ND – Non-detect NS – No Sample
Well Screen
U – Upper Aquifer M – Middle Aquifer L – Lower Aquifer Sulfate MCL is the upper limit of the secondary MCL
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North Management Area: TDS
NT NT Decrease from last sample Increase from last sample No change from last sample Decreasing trend Increasing trend No trend NT
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ND – Non-detect NS – No Sample
Well Screen
U – Upper Aquifer M – Middle Aquifer L – Lower Aquifer TDS MCL is the upper limit of the secondary MCL
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Central Management Area: TDS
NT NT NT NT NT Decrease from last sample Increase from last sample No change from last sample Decreasing trend Increasing trend No trend NT
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ND – Non-detect NS – No Sample
Well Screen
U – Upper Aquifer M – Middle Aquifer L – Lower Aquifer TDS MCL is the upper limit of the secondary MCL
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South Management Area: TDS
NT Decrease from last sample Increase from last sample No change from last sample Decreasing trend Increasing trend No trend NT
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ND – Non-detect NS – No Sample
Well Screen
U – Upper Aquifer M – Middle Aquifer L – Lower Aquifer TDS MCL is the upper limit of the secondary MCL
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Radionuclides (Gross Alpha)
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