Nolan et al, United States Geological Survey National Ambient Water Quality Assessment Program Risk of Groundwater Contamination.

Transcription

1 olan et al, 1998 United tates Geological uvey ational Ambient ate Quality Assessment Pogam Risk of Goundwate Contamination HA Figue 1

2 HATIG 1 HATIG 3 HATIG 4 HATIG 5 HATIG 6 HATIG /1/93 1/1/94 1/1/95 1/1/96 12/31/96 12/31/97 12/31/98 12/31/99 12/30/00 12/30/01 12/30/02 12/30/03 ample Date Hastings Municipal ells itate Results HA Figue 2

3 DAKOTA COUTY Mississippi Rive ROMOUT IIGR TOHIP HATIG Vemillion Rive VRMILLIO Municipal Boundaies tudy Aea, howing ection Lines VRMILLIO TOHIP MARHA TOHIP RAVA TOHIP Miles itate tudy Aea HA Figue 3

4 tudy Aea Municipal Bounday Miles 2000 Digital Othophoto HA Figue 4

5 tudy Aea Municipal Boundaies Land Cove Classification Buildings/Pavement 51%-75% Impevious Up to 50% Impevious 26%-50% Impevious 11%-25% Impevious 4%-10% Impevious Foest/oodland Gassland/Paiie Mash hubland Planted/cultivated vegetation Copland ate Miles 2000 Land Cove Classification HA Figue 5

6 tudy Aea Municipal Boundaies Zoning Residential Business/Commecial Industial Agicultue Planned Development Public/Paks Misc ate Miles Zoning HA Figue 6

7 eptic ystems Built o maintained within the past 3 yeas ( ) Built o maintained 3 to 10 yeas ago ( ) Built o maintained moe than 10 yeas ago o infomation on septic system maintenance o constuction tudy Aea Metopolitan Uban evices 1998 Metopolitan Uban evices, 2040 (est.) Municipal Boundaies Miles Municipal evices HA Figue 7

8 tudy Aea Municipal Boundaies Bedock Geology Platteville & Glenwood Fomations t. Pete andstone Paiie du Chien Limestone Jodan andstone Fanconia andstone/hale Miles Bedock Geology HA Figue 8

9 tudy Aea Municipal Boundaies Depth to Bedock Less than Moe than Miles Depth to Bedock HA Figue 9

10 Miles tudy Aea Municipal Boundaies Bedock Geology Platteville & Glenwood Fomations t. Pete andstone Paiie du Chien Limestone Jodan andstone Fanconia andstone/hale uficial (Quatenay) Geology Floodplain Alluvium Colluvium lopewash and Lowe Rive Teace Middle Rive Teace Uppe Rive Teace Des Moines/upeio Mixed Outwash upeio Outwash Rive Falls (Pe-isconsinan) Dift "Old Gay" (Pe-isconsinan) Till Bedock ate uficial (Quatenay) Geology HA Figue 10

11 oils tudy Aea Municipal Boundaies ilty Clay Clay Clay Loam Loam andy Loam and Unknown ate Miles Geneal oil Type HA Figue 11

12 tudy Aea Municipal Boundaies Pollution ensivity: ate Tansit fom uface to Aquife Vey High -- Hous to Months High -- eeks to yeas High-Modeate -- Yeas to a decade Modeate -- eveal yeas to decades ate Miles Goundwate ensitivity to Pollution HA Figue 12

13 Known inkholes Falls of the Vemillion Vemillion Rive tudy Aea Majo atesheds of Dakota County Mississippi Rive Minnesota Rive Vemillion Rive Cannon Rive Cedit Rive Vemillion Rive ateshed HA Figue 13

14 $Z Municipal ells itate Results 0-1 Backgound 1-3 howing Human Impact 3-10 levated xceeds Dinking ate tandad tudy Aea Municipal Bounday $Z $Z $Z $Z $Z $Z $Z $Z Miles itate Results HA Figue 14

15 xceeds Dinking ate tandad (10 ppm o moe) 26% Backgound (0-1 ppm) 41% levated (3-10 ppm) 26% howing Human Impact (1-3 ppm) 7% itate Results HA Figue 15

16 itate Results 0-1 Backgound 1-3 howing Human Impact 3-10 levated xceeds Dinking ate tandad oils ilty Clay Clay Clay Loam Loam andy Loam and Unknown ate High itate Aeas High itate Aeas and oil Type HA Figue 16

17 eithe 0% Pesticides Only 11% Caffeine Only 30% Caffeine & Pesticides 59% Pesticides wee detected in 70% of wells sampled Caffeine was detected in 89% of wells sampled Caffeine and Pesticide Detections HA Figue 17

18 G913: ea ive, shallow G914: Away fom ive, shallow G915: ea ive, deep HA Monitoing ells tudy Aea Municipal Boundaies Bedock Geology Platteville & Glenwood Fomations t. Pete andstone Paiie du Chien Limestone Jodan andstone Fanconia andstone/hale G910: ea ive, deep G912: Away fom ive, deep G907: ea ive, shallow G908: Away fom ive, shallow G909: ea ive, deep Miles Monitoing ell Locations HA Figue 18

19 uface levation uface levation Loam Oganic and and G ft L Clay G ft L Vemillion Rive 901 levation (msl) and G ft L itate Results (mg/l Location ID Range Median G (n = 15) G (n = 15) G (n = 15) (n = 16) GP Location: County Coodinate ystem othing (ft) Upsteam Monitoing ells Locations, tatic ate Levels and itate Results eptembe 2000 Decembe 2002 HA Figue 19

20 uface levation uface levation Loam Fine and and Vemillion Rive Vey Fine and ilty and Limestone/and levation (msl) and & Rock and itate Results (mg/l Location ID Range Median G (n = 15) G (n = 15) (n = 15) G ft L Fine and G ft L GP Location: County Coodinate ystem othing (ft) Monitoing ells ove Buied Bedock Valley Locations, tatic ate Levels, and itate Results Octobe 2000 Decembe 2002 HA Figue 20

21 uface levation uface levation levation (msl) G ft L Fine and Fine and Loam and Fine ilty and Fine ilty and G ft L G ft L and & Rock Vey Fine and GP Location: County Coodinate ystem othing (ft) Fine and Vemillion Rive itate Results (mg/l Location ID Range Median G (n = 15) G (n = 14) G (n = 15) (n = 16) L Key: Mach 2001 Apil 2001 May 2001 Downsteam Monitoing ells Locations, tatic ate Levels, and itate Results Octobe 2000 Decembe 2002 HA Figue 21

22 ate Table (est.) Rive levation (est.) uface levation (est.) City of Vemillion uface lev. ~ 830 ft. msl ate Table ~ 825 ft. msl Upsteam Monitoing ells uface lev. ~ 825 ft. msl ate Table ~ 820 ft. msl Buied Bedock Valley Monitoing ells uface lev. ~ 810 ft. msl ate Table ~ 750 ft. msl Downsteam Monitoing ells uface lev. ~ 795 ft. msl ate Table ~ 750 ft. msl 700 ~ 1 mi. ~ 3 mi. ~ 2 mi. ~ 1 mi. Below Falls in Hastings uface lev. ~ 730 ft. msl ate Table ~ 700 ft. msl Changes in ate Table vs. Vemillion Rive Between Vemillion and Hastings HA Figue 22

23 $T $T $T$T mpie TP &V VR20-6 VR15.6 $T 802 &V Hampton TP Vemillion TP &V %U$T G 907 G 908 G G 914 G 913 %U 902 G 915 %U G 910 G Miles &V HA Monitoing ells 3-10 mg/l 1-3 mg/l 0-1 mg/l CD Monitoing ites $T $T %U Met Council Monitoing ites tudy Aea astewate Teatment Plants 10 mg/l o geate 10 mg/l o geate 3-10 mg/l $T 1-3 mg/l $T 0-1 mg/l HA uface ate Monitoing 1-3 mg/l 3-10 mg/l Vemillion Rive itate Results HA Figue 23

24 Upsteam to Downsteam Location ID Agency Desciption uface ate o Goundwate (/G) Data Collection Model itate (mg/l) Range itate (mg/l) Median Median Rank (itate) ince Feb low flow and CD Vemillion Rive at 220th t event sampling (n = 43) CD Vemillion Rive at Denmak Ave. ince Feb low flow and event sampling (n = 43) CD oth Ceek at Hwy. 3 ince Feb low flow and event sampling (n = 43) CD oth/middle Ceek at Hwy. 3 ince Feb low flow and event sampling (n = 43) 5 5 VR20.6 Met Council Mile 20.6, upsteam of TP ince Bi-weekly sampling (n = 69) ( M edian = 1.82) (n = 69) ( M edian = 3.86) 12 6 VR15.6 Met Council Mile 15.6, downsteam of TP ince Bi-weekly sampling ince Feb low flow and CD outh Banch at 200th t. event sampling (n = 43) 11 ince Feb low flow and CD Vemillion Rive at Goodwin Ave event sampling (n = 43) 13 ince ov monthly GP Vemillion Rive at Goodwin Ave sampling (n = 16) 17 Deep monitoing well nea ince ov monthly 10 G909 GP Vemillion Rive at Goodwin Ave G sampling (n = 15) 1 hallow monitoing well nea ince ov monthly 11 G907 GP Vemillion Rive at Goodwin G sampling (n = 15) 2.5 hallow monitoing well appox. 100 ft. fom Vemillion Rive at ince ov monthly 12 G908 GP Goodwin Avenue G sampling (n = 15) GP Vemillion Rive ove buied bedock valley ince ov monthly sampling (n = 15) G910 GP Monitoing well nea ive ove buied bedock valley ince ov monthly G sampling (n = 15) G912 GP Monitoing well appox. 200 ft fom ive ove buied bedock valley (beside confield) ince ov monthly G sampling (n = 15) GP Vemillion Rive in Hastings Pak ince ov monthly sampling (n = 16) G913 GP Monitoing well nea ive in Hastings Pak ince ov monthly G sampling (n = 15) G915 GP Deep monitoing well nea ive in Hastings Pak ince ov monthly G sampling (n = 14) G914 GP Monitoing well appox. 100 ft. fom ive in Hastings Pak ince ov monthly G sampling (n = 15) 9.5 Vemillion Rive itate Results HA Figue 24

25 levation of ate Table (feet msl) HA Monitoing ells HA Monitoing ells Potentiometic uface (ate Table) Bedock Geology Platteville & Glenwood Fomations t. Pete andstone Paiie du Chien Limestone Jodan andstone Fanconia andstone/hale ate Table levation (feet msl) Dakota County Geologic Atlas Miles ate Table: HA Monitoing ell Data compaed to Dakota County Geologic Atlas Piezometic uface HA Figue 25

26 Bdk_04contou.shp levation of Bedock (feet msl) Miles Bedock levation Tend uface Least quaed o Fit HA Figue 26

27 Bdk_05contou.shp levation of Bedock (feet msl) Miles Bedock levation Tend uface xact Fit HA Figue 27

28 Aquife Thickness (20 foot intevals) Opc_th02contous.shp Miles Thickness of the Paiie du Chien Goup (Ignoing Quatenay osion) HA Figue 28

29 Aquife Cjdn_th05contou.shp Thickness (20 foot intevals) Miles Thickness of the Jodan Aquife (Ignoing Quatenay osion) HA Figue 29

30 levation of Bottom of Aquife (feet Cj_bot10contou.shp msl) Miles Base of the Jodan Aquife (Ignoing Quatenay osion) HA Figue 30

31 D-1 MIR_T_PTR-2 Model Polygon ID's MR_JCT MR_BV_1 MR_AVAG D-7 MR_BV_2 D-3 D-4 D-5 D-2 D-6 D-BV_1 MIR P HAKA H2D-8 D-9 -BV_ LAK_1 -LAK_2 D D-13 D-14 D-15 MIR_HAT_LOR3 D-17 D-18 MIR_RDIG_M G-1 RI-2A G-2 G-3 RI Miles Goundwate Model: Polygon IDs 1 HA Figue 31

32 D-BV_2 MIR_PRIG_LAK Model Polygon ID's HAT_1HI MIR_HAT_LOR1 D-10 PX1 D-BV_3 T1 HAT_1LO MIR_HAT_LOR2 X7 HAT_2 PX3 D-BV_4 D-BV-V2 D-BV_5 D-15 D_BV_V1 D-19 D-22 D-21 D-16 D-BV_6 MIR_HAT_LOR3 D_20 D-23 D-26 D-25 G-1 D Miles Goundwate Model: Polygon IDs 2 HA Figue 32

33 Appoximate ffective Aquife Base (feet ML) Aq_polygon.shp Miles Goundwate Model: Appoximate ffective Aquife Base HA Figue 33

34 Aquife Thickness (feet) Aq_polygon.shp 328 Unconfined Miles Goundwate Model: Aquife Thickness HA Figue 34

35 Aquife Pemeability (ft/day) Aq_polygon.shp Miles Goundwate Model: Aquife Pemeability HA Figue 35

36 Infiltation and xfiltation at the Top (inches/yea) Vael_top_poly.shp egative = infiltation Positive = exfiltation Miles Goundwate Model: Infiltation & xfiltation Rates at the Top of the Aquife HA Figue 36

37 Leakage at the Bottom (inches/yea) Bottom Leakage (positive egative = downwad Positive = upwad Miles Goundwate Model: Leakage at the Bottom of the Aquife HA Figue 37

38 Line lements fo Rives ting_lines.shp Dischage pecified Head pecified Miles Goundwate Model: Line lements fo Rives HA Figue 38

39 Piezometic Piezometic Contous Contous (feet msl) Miles Goundwate Model: Piezometic Contous HA Figue

40 HA Figue 40 Goundwate Model: Residuals to Obsevation Heads 740 Chkhead_hans.dbf Miles Model Residuals Pedicted - Obseved (feet)

41 HA Figue 41 Goundwate Model: stimated Flow Paths to HA ells Miles ell itate Concentation (ppm) Path line by Time of Tavel (days)