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WSRC-TR-97-O0318

Monitoring of the Water Levels in the Wetlands of FourmileBranch Near the F- and H-Areas of SRS: FY97

by

K. L. Dixon

Westinghouse Savannah River CompanySavannah River SiteAiken, South Carolina 29808

A. L. Schwartzman

DOE Contract No. DE-AC09-96SR18500

This paper was prepared in connection with work done under the above contract number with the U. S. -Department of Energy. By acceptance of this paper, the publisher and/or recipient acknowledges the U. S.Government’s right to retain a nonexclusive, royalty-free license in and to any copyright covering this paper,along with the right to reproduce and to authorize others to reproduce all or part of the copyrighted paper.

. .

WSRC-TR-97-00318, Rev. O -

Monitoringof the WaterLevels in the Wetlandsof FourmileBranch Near the F-and H-Areasof SRS: FY97

Kenneth L. DixonAdam L. Schwartzman

WWLASSIFW3)00ES NOTCONTAIN

UNCIASSFK) CONTFELLEDNUCLEAR INFORMATION

Aoc&

I

WestinghouseSavannahRiver CompanySavannahRiver SiteAiken, SC 29808

—— . .

Prepared for the U.S. Department of Energy under contract no. DE-AC09-~6SR18500

.,

DISCLAIMER

This report was prepared as an account of work sponsmd by m agency of the United StatesGovemmen~ Neither the Unkd.States Gove~~nt ~or any agencymere-of, nor any of theiremployees, makes any warranty,express or mphed, or assumes. any Iega.1liability orrqonsibility for the accuracy, completeness: or usefulness of any reformation, app~~s,produc~ or process disclosti or represents that Its use would not infringe privately owned rights.Reference herein to any specific commercial produc~ process, or service by trade name,trademark manufacturer, or otherwise does not necessarily constitute or imply its endorsemen~recommendation, or favoring by the United States Government or any agency ‘thereof. Theviews and opinions of authors expressed herein do not necessarily state or reflect those of theUnited States Government or any agency thereof.

This report has been reproduced directly fkomthe best available copy.

Available to DOE and DOE conwactorsfrom the Mice of Scientific and Technical Information,P.O. Box 62, Oak Ridge, TN 37831;prices available fbm (615) 576-8401.

Available to the public finm the National Te&nical Information Service, U.S. Department of .Commercet 5285 Port Royal Road, Springfiel& VA 22161.

DISCLAIMER

Portions of this document may be illegiblein electronic image products. Images areproduced from the best available originaldocument.

. .

WSRC-TR-97-O0318Rev. O

September 1997

Monitoring of the Water Levels in the Wetlandsof FourmileBranch Near the F-and H-Areas of SRS: FY97

Kenneth L. DixonAdam L. Schwartzman

.

Prepared for the U.S. Department of Energy under contract no. DE-AC09-96SR18500-—- -.

. .

Monitoring of the Water ,bels in the Wethnds of Fourmi[e Branch Near the F-Ad H-Areas of SRS

Monitoring of the Water Levels in the Wetlands of Fourmile BranchNear the F- and H-Areas of SRS: FY97

K. L. Dixon and A. L. SchwartzmanSavannah River Technology CenterWestinghouse Savannah Rher CompanyAlken, SC 29802

Executive Summary

A remediation system for the groundwater in F- and H-Areas is being implemented in accordance with aResource Conservation and Recovery Act (RCRA) Hazardous Waste Part B Permit. The design of thissystem includes a network of extraction and injection wells to maintain hydraulic control of the 10,000pCi/rnl tritium plume. Drawdown of the water table near the extraction wells may result in drying of aportion of the wetland areas near Fourmile Branch. In order to assess potential impacts of theremediation effort on the riparian wetland system, a network of twenty three piezometers was installed.This networkof piezometers was established along the groundwateroutcrop (i.e., seepline) for the watertable aquifer, specifically targeting those areas closest to the extractionwells. The purpose of thepiezometer network is to establish baseline hydraulic head data for the water table aquifer at the F- andH-Area seeplines prior to startup of the groundwater extraction/injection remedlation system.

Monthly water level measurements were taken from each piezometer, and are presented in thk report.Additionally, some piezometers were instrumented with data loggers for continuous monitoring of waterlevels. The purpose of continuous monitoring is to investigate the natural variability of water levels inthe riparian wetland system of Fourmile Branch. Of particular interest is the variation in water levelsassociated with rainfall events, and evapotranspiration demand. The frequency, magnitude, and durationof these natural variations are unknown, and more frequent monitoring is required to assess them.Additionally, following startup of the extraction/injection system, increased variation in the hydrologicsystem in and around the wetlands is expected. These variations are expected to be more pronounced atthose locations closest to the extraction wells. Thus, the piezometers-closest to the extraction wells werechosen for instrumentation. The establishment of a baseline for the natural variations, as well as for the

. variations associated with the remediation system startup, will allow for the determination of anappropriate monitoring frequency for the remaining piezometers.

The informationin thisreportwasdevelopedduringthecourseofworkunderContractNo.DE-AC09-96SRl~5Q v.hh the U. S.Departmentof Energy.

1

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., .

WSRC-TR-97-00318~.

Background

Seepage basins in the F- and H-Areas of theSavannah River Site (SRS) received low-levelradioactive waste effluent from the chemicalseparations processes in the General SeparationsArea. This waste effluent consisted mostly ofsodium hydroxide, nitric acid, Iow Ievels ofvarious radlonuclides (primarily tritium), andsome metals (IGllian et al., 1985a and b).Discharges to the seepage basins were

discontinued in 1988and the basins werecapped and sealed in 1990. As a result of basinoperations, groundwater beneath and downgradient of the basins was contaminated. Thecontamination is located primarily in the watertable aquifer (Aquifer Zone IIB2) and in theBarnwell/McBean Aquifer (Aquifer Zone DBl).In both F- tid H-Area near the seepage basins,groundwater in Aquifer Zone I113zand HBlflows toward FourmiIe Branch. Aquifer ZoneIIB2 dkcharges to the wetlands and FourmileBranch whereas Aquifer Zone IIBl dischargesprimarily to Fourmile Branch. Contaminantsoriginating from the seepage basins have beendetected in shallow groundwater outcrops (i.e.the seepline] in the wetlands of FourmileBranch in.both F- ‘andH-Area (Haselow et al.,1990; Dixon et aI., 1993% Dixon.et al., 1993b,Dixon et al., 1994).

A remediation system for the groundwater in F-and H-Areas is being implemented inaccordance with a Resource Conservation and‘Recovery Act (RCRA) Hazardous Waste Part BPermit. The design of this system includes anetwork of extraction and injection wells tomaintain hydraulic control of the 10,000 pCdmltritium plume.

The remediation system in F-Area will consistof a total of seventeen wells within AquiferZone B13Z;nine extraction and eight injectionwells. The remedlation system in H-Area willconsist of twenty three wells within AquiferZone IIB2, fifteen extraction wells and eightinjection wells. Figures 1 and 2 show thelocations of the extractionfinjection wells for thewater table aquifer (Aquifer Zone H132)in F-

Area and H-Area, respectively. The extractionwells are prefixed “FIX” and “HEX” and theinjection wells are prefixed “FIN” and “HIN

Decreases in water levels associated withdrawdown near the extraction welk may resultin drying of a portion of the wetlands, and anoverall movement of the seepline-towardsFourmile Branch. Chronic depression of thewater table at the wetlands, and the associatedreversal in direction of groundwater flow, may

result in alterationsof the wetlandplant andanimal communities in this area. Further,changes in the hydrology of the wetlands willimpact contaminant transport and contaminantconcentrations at the new seeplines.

To aid in assessing the impacts of theremedlation system on the wetlands, changes inwater levels in and near the wetlands must bemonitored. Baseline hydraulic head data for thewater table aquifer at both the F- and H-Area ~seeplines should be collected prior to initiationof groundwater extraction and continuedfollowing startup. This is critical to identifyingthe source of any wetland impacts that maybeobserved following startup of theextractiordinjection system. To accomplish this,a network of piezometers was established in thewetlands of Fourrnile Branch in both F- and H-

Areas in 1996(Dixon, 1996).Currently,thisnetwork consists of twenty three piezometers atseventeen different locations. The purpose ofthis report is to detail the results of monthlywater level measurements.

METHODS

A total of twenty three water table piezometershave been instaIIed at seventeen Iocations in thewetlands of Fourmile Branch near F- and H-Areas. During January and May of 1996,twenty piezometers were installed at fourteenlocations in a network in both F- and H-Area(FPZ and HPZ prefixes). The network wasdesigned to outline the current seepline focusingon those areas expected to be most jmpacted bythe remediation system (Figures 1 and 2). Atlocations with heterogeneous strali~a@y,

2

..

Monitoring of the Water Levels in the Wetlands of Founnile Branch Near the F-And H-Areas of SRS

piezometers were installed in clusters. Thedeeper piezometers were designated with thesuffix “A”, and the shallow piezometers weredesignated with the suffix “B”. During June1997, three additional piezometers wereinstalled in a reference area located in thewetlands of Fourmile Branch, but outside thearea of influence of the remediation system(Figure 3). These reference piezometers (FHRprefix) were intended to provide a baseline forcomparison to water level changes observed inthose piezometers located within the area ofinfluence of the groundwater remediationsystem.

With the exception of FPZO03A, all piezometerswere installed using hand augering equipment (31/4” bucket auger) according to WSRC-3Q5(Chapter 7) procedures. Location FPZO03A isin an upland area, and due to the depth to thewater table at this location, it was installed usinga hollow stem augering method.

A detailed discussion of the installation methodsfor all piezometers but the referencepiezometers has been presented by Dixon(1996). The installation methods for thereference piezometers were essentially the sameas those described by Dixon (1996) and are notrepeated “here.

Table 1 gives the piezometer constructioninformation for all the piezometers (FPZ, HPZ,and FHR series).

Measurement of Water Levels

Water levels in the piezometers were mea&redmonthly using an electric water level tape.From these measurements, the elevation of thewater table was determined for each location.Additionally, the water level of FourmileBranch was measured at two locations. Thesetwo stream sites were located where Road C4and Road El cross Fourmile Branch.

Instrumentation of Selected Piezometers

In an effort to investigate the natural variabilityof water levels in the riparian wetland system ofFourmileBranch, several piezometerswereequipped with data loggingequipmentto allowfor continuous water level monitoring. Ofparticular interest is the variation in water levelsassociated with rainfall events, andevapotranspiration demand. The frequency,magnitude, and duration of these naturalvariations are unknown, and more frequentmonitoring is required to assess them.Additionally, following startup of theextractionhjection system, increased variationin the hydrologic system in and around thewetlands is expected. These variations areexpected to be more pronounced at thoselocations closest to the extraction wells. Thus,the piezometers closest to the extraction wellswere chosen for instrumentation. Theestablishment of a baseline for the naturalvariations, as well as for the variationsassociated with the remedlationsystem startup; “ ~

will allow for the determination of anappropriate monitoring frequency for theremaining piezometers.

The piezometers selected for instrumentationare shown in Figures 1 and 2, and are listed inTable 2. Table 2 also gives the date ofinstrumentation for each piezometer. Each ofthe selected piezometers was equipped with apressure transducer (5 psig range) controlled bya Campbell Scientific, Inc. CR1OX data logger.Additionally, at locations FPZO05A andHPZO03A, a tipping bucket rain gage wasconnected to the CR1OX to provide rainfall data.

Water level measurements were monitoredcontinuously at each location and averagedevery thirty minutes. Additionally, rainfallamounts were totaled every thirty minutes forboth F- and H-Areas.

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3

.

wSRC-TR-97-O0318“.

Results and Discussion

Results from the monthly water levelmeasurements for the period of September 1996through August 1997 are presented in Tables 3Aand 3B. The minimum, maximum, and averagewater level elevation, and standard deviationwas computed for each location and is presentedin Table 4. Table 4 also gives the average waterlevel in each piezometer relative to groundelevation. Hydrography for each location werecreated and are presented in Figures 4 through17.

Preliminary evaluation of data collected fromthe continuous monitoring effort has confirmedan expected correlation between rainfall events

and water levelsin the wetlands.Figures18and19 represent typical plots of data collected fromthe piezometers. From these figures, it can beseen that the response to rainfall was immediateas well as transien~ however,. more detailedstudy over a longer period of time is needed todetermine the magnitude and duration of thetransient surge in water levels associated withrainfall.

In addition to the rainfall response, diurnalfluctuations in water level due toevapotranspiration are also clearly shown inF@mes 18 and 19. A periodic decline in waterlevels is observed during the middle portions ofeach day, which may be attributed to increasedevapotranspiration demand. During thenighttime hours when evapotranspirationdemands are lowest, the water levels recover. Asseen in Figure 18, fluctuations of 0.1 ft are notuncommon during peak evapotranspirationperiods.

F&ures 18 and 19 demonstrate the naturalvariability in water levels in the wetlands ofFourmile Branch. In order to completely definebaseline conditions for the wetlands, themagnitude, frequency, and duration of thevariations must be quantified. Long termassessment of data collected from theinstrumented piezometers will allow for a more

.

detailed analysis of the natural variationsassociated with these types of wetland systems.

References

Dixon, K. L. 1996. Monitoring of the WaterLevels in the Wetlands of Fourmile Branch Nearthe F- and H-Areas of SRS. WSRC-TR-96-0289. Westinghouse Savannah Xlver Company,Savannah River Technology Center, Alken SC.

Dixon, K. L., V. A. Rogers, and B. B. Looney.1993a. Results of the quarterly tritium survey ofFour Mile Creek and its seeplines in the F- andH- Areas of SRS: September 1993. WSRC-TR-93-286-ESS, Rev. 1, Westinghouse SavannahRNer Company, Savannah RNer TechnologyCenter, Alken SC.

Dixon, K. L. and V. A. Rogers. 1993b. Semi-annual sampling of Fourmile Branch and itsseeplines in the F- and H-Areas of SRS: July1992. WSRC-TR-93-289, Westinghouse .Savannah RNer Company, Savannah RiverTechnology Center, Axken SC.

Friday, G. P. 1997. Environmental Summary ofthe F- and H-Area Seepage Basins GroundwaterRemediation Project, Savannah River Site.WSRC-TR-97-0130, Westinghouse SavannahRNer Company, Alken, SC.

Haselow, J. S., M. Harris, B. B. Looney, N. V. ,Halverson, and J. B. Gladden. 1990. Analysis ofsoil and water at the Four Mile Creek seeplinenear the F- and H-Areas of SRS. WSRC-RP-90-0591, Westinghouse Savannah RNer Company, “Savannah River Technology Center, Alken SC.

Killian,T.H., N.L. Kolb, P. Corbo,and LW.Marine. 1985a. F-Area seepage basins. DPST-85-704, E.I. du Pent de Nemours and Company,Savannah RNer Laboratory, Aiken, SC.

KNian, T.H., N.L. Kolb, P. Corbo, and I.W.Marine. 1985b. H-Area seepage basins. DPST-85-706, E.I. du Pent de Nemours and Company,Savannah River Laboratory, Alken, SC.

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4

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Monitoring of the Water Levels in the Wetlana!rof Fourmile Branch Near the F-And H-Areas of SRS

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Table2. Llstofl?iezometer shavingdat clogging.

Piezometer Latitude Longitude Installation DateFPZOOIA 33.26827 81.68141 September 1996FPZO02A 33.26856 81.68131 September 1996FPZO04A 33.27004 81.67879 July 1996FPZO05A 33.26910 81.67832 July 1996FPZO06A 33.26899 81.67781 July 1996

HPZO02A 33.27595 81.65820 September 1996HPZO03A 33.27452 81.65636 August 1996

HPZO04A 33.27545 81.65605 August 1996

HPZO05A 33.27562 81.65490 September 1996

—---

_———- .——. ————.-..-—

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6

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Monitoring of the Wa(er Levels in the Wetkma%of Fmmdle Branch Near the F-And H-Areas of SRS

— ----.-able3. Water Level Measurements at Individual Piezometers, September 1996- February 1997

PiezometerID

FPZOOIAFPZO02AFPZO03AFPZO04AFPZO05AFPZO05BFPZO06AFPZO06BFPZO07AFPZO07BFPZO08AFPZO08B

HPZOOIAHI?ZO02AHPZO03A

~HPZO03BHPZO04AHPZO05AHPZO05BHPZO06A

FMB/C4FMB/El

FHROO1FHRO02FHRO03

Water Level Elevations

seD-96

197.90201.30188.49201.20191.02191.16189.34188.76192.91194.26187.59187.56

202.28217.96200.79200.56209.96212.21213.08202.11

178.24214.35

Ott-96

197.98201.26187.84201.24191.12191.18188.88188.72192.91194.31187.60187.60

202.32217.86201.00200.88210.23212.14212.08202.02

178.19214.39

Nov-96

197.96201.18187.92201.18191.10191.16189.04188.86192.95194.12187.56187.61

202.33217.80201.05200.89210.27212.56212.62201.94

177.78214.44

Dee-96

197.97201.15188.33201.14191.13191.18189.12188.95193.02194.38187.62187.62

202.33217.82201.39200.88210.28212.64212.70201.72

177.81214.47

Jan-97

197.96201.19189.29201.14191.17191.19189.33189.11193.14194.4

187.66187.61

202.35218.05201.34200.90210.29212.95213.07201.82

177.82214.47

Feb-97

198.02201.96191.22201.62191.24191.19189.67189.28193.34194.42187.71187.62

202.38218.70201.53200.92210.35213.35213.44201.94

178.21214.67

NA NA NA NA NA NANA NA NA NA NA NANA NA NA NA NA NA

GroundElevation

(ml)

197:90

201.20194.00203.10190.90190.90189.40189.40194.50194.50187.40187.40

202.40218.80200.40200.40210.70213.80213.80201.70

NANA

NANANA

——..

7

.— —. .

WSRC-TR-97-00318J.

Table4. Water bvel Measurements at Individual Peizometers, March l997-Augustl997

1 l—Ground

Piezometer Water Level Elevations ElevationID (msl) (msl)

Mar-97 Apr-97 May-97 Jun-97 Ju1-97 Aug-97

FPZOOIA 197.96 197.96 197.91 197.89 197.96 197.92 ; 197.90FPZO02A 201.39 200.91 200.96 200.91 201.26 200.86 201.20FPZO03A 189.55 188.61 188.74 188.36 189.15 187.27 194.00FPZO04A 201.31 201.22 200.98 200.88 201.01 200.79 203.10FPZO05A 191.18 191.17 191.41 191.07 191.11 191.05 190.90FPZO05B “ 191.18 191.22 191.21 191.18 191.15 191.13 190.90FPZO06A 189.32 189.43 189.00 188.81 189.09 188.82 189.40FPZO06B 189.12 189.19 188.84 188.56 188.89 188.70 189.40FPZO07A 193.11 193.20 192.93 192.77 192.96 192.81 194.50FPZO07B 194.40, 194.42 194.37 194.27 194.35 194.30 194.50FPZO08A 187.64 187.68 187.62 187.60 187.60 187.59 187.40FPZO08B 187.60 187.62 187.62 187.55 187.58 187.60 187.40

HPZOOIA 202.38 202.37 202.32 202.22 202.33 202.28 202.40HPZO02A 218;39 218.38 217.84 217.62 218.00 217.48 218.80HPZO03A 201.38 201.38 201.13 201.23 201.40 201.23 200.40HPZO03B. 200.86” 200.89 200.71 200.49 200.53 200.55 200.40 .HPZO04A 210.26 210.28 209.76 210.08 210.08 210.06 210.70HPZO05A 212.81 213.38 212.60 211.94 212.88 211.91 213.80HPZO05B 212.90 213.54 212.85 211.89 212.98 213.90 213.80HPZO06A 201.89 202.02 201.93 202.14 202.29 202.24 201.70

FMB/C4 178.03 178.31 178.39 178.4 178.81 178.41 NAFMB/El 214.48 214.64 214.41 214.38 207.18 214.35 NA

FHRool NA NA NA NA 268.99 268.58 269.90I?J4RO02 NA NA NA NA 272.46 271.05 275.40

“. FHRO03 “NA NA NA NA 219.87 219.90 220.50

#

-—..

8

.

Monitoring of the Water LeveLs in tlte wetbtl~ of Fourmile Branch Near theF-And H-Areas of SRS

Table 5. Average Water Level Measurements for the Period of September 1996 to August 1997.

?iezometer Minimum Maximum Average Standard Water Level RelativeID Water Level Water Level Water Level Deviation to Ground Elevationa

(msl) (msl) (msl) (ft) (ft)

FPZOOIA 197.89 198.02 197.95 0.09 .05FPZO02A 200.86 201.96 201.19 0.78 -.01FPZO03A 187.27 191.22 188.73 2.79 “ -5.27FPZO04A 200.79 201.62 201.14 0.59 -1.96FPZO05A 191.02 191.41 191.15 0.28 0.25FPZO05B 191.13 191.22 191.18 0.06 0.28FPZO06A 188.81 189.67 189.15 0.61 -0.25FPZO06B 188.56 189.28 188.92 0.51 -0.48FPZO07A 192.77 193.34 193.00 0.40 -1.50FPZO07B , 194.12 194.42 194.33 0.21 -0.17FPZO08A 187.56 187.71 187.62 0.11 0.22FPZO08B 187.55 187.62 187.60 0.05 0.20

HPZOOIA 202,22 202,38 202.32 0.11 -0.08HPZO02A 217.48 218.70 217.99 0.86 -0.81HPZO03A 200.79 201.53 201.24 0.52 0.84HPZO03B 200.49 200.92 200.76 0.30 0.36HPZO04A 209.76 210.35 210.16 0.42 -0.1HPZO05A 211.91 213.38 212.61 1.04 -1.19J3PZO05B 211.89 213.90 212.92 1.42 -0.88HPZO06A 201.72 202.29 202.01 0.40 0.31

FMBIC4 177.78 178.81 178.20 0.73 NAFMB/El 207..18 214.67 213.85 5.30 NA

FHROOlb 268.58 268.99 268.79 — 1.11FHRO02 271.05 272.46 271.76 — 3.64FHRO03 219.87 219.90 219.89 — .61

Positive values indicate the water level is above ground elevation. Negativevalues indicate the water’level is below ground elevation.bFHROO1,FHRO02, and FHRO03 contain only two measurements.

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‘\* 1 “,,\‘\

i “s’--- <“s-”>-.,‘\ . ma ‘d, ; .0

‘\ :..- ;,”j Ka U7c,n

‘\ --.- ,,- + ‘-~?(w~---. ”

‘\ “ ,.”-”2 lEx-12 !3\\.-@~.1.j l&&% ;,y

=.$( @ Ex-u “m= m ~.~ m-p 4.

●’ ‘. HsBtzse,a + ~%w,-‘#t ‘.. + ,-------‘--- ---- , -----s-

---~ -.. ,tPzcaa2:8

t -., .,,.. 8. ‘. .-.* , . “iy ml~--------- ~------ . . -----?

~.’ ---- ,- . ‘..+‘. , *

.“-----.,. : .

‘\.

-.----~ ‘. . ,*

‘. ,

‘\.

‘. , ..2.

tf”mt ~------” ,

‘\,

.’‘. ,\ .

. *’

ta 71.C

+

I&!l lrlml

4

tm 62CD+

,: \‘s* ‘\*.

‘. ‘\‘--- ‘\.-.

!

/ \Hsa

lml!6

‘.il.

lfzcQs-

H=lMcir---- —-— --+ ‘.., ‘-—---—- -f$?<@.. -,* -

s,,*..

tEa148ae

~igure 2. Extraction/injection well locations and piezometer locations for Aquifer Zone IIBz (watertable) in H-Area.

,’..,.,-,

.-:

/7

ttm Oyc I/

IEa WC.o4

. .

WELLSYM60LLEGENO● EXIWCIW KLLS(WIRTKIIMY.EUO4NJXIKMWS(WAIUtTMEWXWBExlRuxwnaLs@mmwwwnmJn&&EclKNKaJsowNmuww#fxEER

wELLZONEOESKMTIONSO.E-KAIHl TMEKWERZUEE32

8,C - wwauw3xxwERzuED31I1A

- ~llwmlzmu

IEslH-REASaPILzLw

1- 0 500~

I sC#l13FEET

I

I wELLLOCATIONS- —.

—.Wn J.UL

*

-. ...——..——.——.4 .._ ~.. — -—_. . .~- .-

PIEZOMETERLOCATION

Figure 3.Referencepiezometerlocations.

-——— —.

4

LEGEND

A FIEZOMETER

•1SRsFENCEDJWEA

n SRS TOPOGRAPHIC CONTOUR

—

FuJtTlfuM3milmm

8

N

35.*

o 1000 2000 3000 ‘ 4000

SCKE FEET .

CC05S

..

..

Monitoring of the Water Levels in the Wetlands of Fourmile Branch Near the F-And H-Areas of SRS

198.02 –

198.00- -

197.98- -

S 197.96 --

~ 197.94 --

~ 197,92-“.— --

C4

— FPZOO1A

---- GroundElevation

ti 197.88

197.86

197.84\

F@re 4. Monthly water level elevations at location FPZOOIA.

202.00-

201.80- -

~ 201.60- -

~201.40- -

g 201,20 -~.. — FPZO02A

q 2(31.00 .- –-–– GroundEIevation>r+ 200.80 -r

= 200.60

200.401

.

Figure 5. Monthly water level elevations at location FPZO02A.

-- -.

15

_—-. .

..4.

.

4

wSRC-TR-97-O0318

194.00r

—--——--————---——— --—- -— —----

192.00 +

~~ 190.00- -

zo —FPZO03Az 188.00- A

--- – GroundElevation$H 186.00- -dM

184.00--

Figure 6. Monthly water level elevations at location FPZO03A.

203.50T

203.00f

——. — _. —__ ____ —__ ____ ____ _

~ 202.50- -03z 202.00- -zs 201.50- -

— FPZO04A

H4 – --- GroundElevation

~ 201.00- -

d 200.50- -

200.00t

Figure 7.Monthly water level elevations at location FPZO04A.

—- -.

16

.. . .

Monitoring of the Water Levels in the Wetlands of Fourmile Branch Near the F-And H-Areas of SRS

191.50 T191.40- -

191.30- -3m 191.20 --Eg 191.1(3 --

~ Igleoo

s~ 190.90

I

-—- —------ ——-— —__________

w 190.80

— FPZO05A -

------- FPZO05B

––-– GroundElevation

190.70t

Figure 8. Monthly water level elevations at location FPZO05A and FPZO05B.

189.80 T

189.60- -

~ 189.40 ——— —_____m~ 189.20 --

~, 189.00. - —FPZO06A

------- FPZO06B

k 188.60- - -.. -. –--– GroundElevationl-l .W 188.40. -

188.20- -

188.00- I

Figure”9. Monthly water level elevations at location FPZO06A and FPZO06B.

—- -.

17

.— .— ...—

.,

-, .<

WSRC-TR-97-O0318.

194.50 — .—— — --- —_- -__— -— __ ---- --—--------------- -------- --------- -- . . ----------------, ---

194.00- -

sg 193.50- -

;—FPZO07A -

9 193.00- -&

---. --- FPZO07B

4+ ---- GroundElevationy 192.50 --w

192.00 --

Figure 10. Monthly water level elevations at location FPZO07A and FPZO07B

187.75 -j-

187.70- -

187.65- -

~ 187.55 ~---

~ 187.50. -

2 187.45- -

~ 187.40 ,- -——— ----— -—-—— -. —-- —— --- -— --laQ 187.35

t187.30

187.25$

— FPZO08A

-.----- FPZO08B

--- – GroundElevation

FQure 11. Monthly water level elevations at location FPZO08A and FPZO08B

.

—- --

18

..

Monitoring of the water Levels in the Wetlands of Fourmile Branch Near the F-And H-Areas of SRS

202.4 —- —- —–-----–-- —–—– —-------

202.35- -

3

z2 202.25 --

—HPZOOIA

FJ ---- GroundElevation

g 202.2

M202.15

‘1

FQure 12. Monthly water level elevations at location IZPZOOIA

218.8 Y -----------------------------

218.6- -

218.4- -3VI 218.2- -z~ 218- -

~ 217.8- ~H$ 217.6 -.

~ 217.4 .-

W 217.2 --

217

216.8 i I

— HPZO02A

- -–- &oundElevation

Figure 13. Monthly water level elevations at location”HPZO02A.

—- -.

19

——-— —_z

WSRC-TR-97-00318

..——-— ..

..

201.6 ~

201.4

.J 201.2

g 201

~ 2oo.8

ij 2oo.6

~ 200.4

H 20002

200

199.8

--------- ------ --------- - . ------- -- ..- “.,

--- -.-- -----------

-— —--__— ___________ _________ __

I I

—HPZ003A -

------- HPZO03B

-––– GroundElevation

Figure 14. Monthly water level elevations at location HPZO03A and HPZO03B

210.8

{

.—--- --—- ---- —___ ____ ____ ____ .210.6

~ 210.4- -z= 210.2zs 210-

— HPZO04Aw -- –– GroundElevation~ 209.8- -w@ 209.6

209.4 i

Figure 15.Monthly water level elevations at location HPZO04A

. —- .-

-.

.

20

N

.

iij

ELEVATION (MSL)NN&l NNIN00000

Nowgw~ !s---- -- 0

hb”mubbw ~“NidSept ~ I I

Ott -- ;I

Nov -- iII

Dec -- II

Jan -- i

Feb-- i1Mar -- 1

II

Apr -- III

May -- I1“

June -- II

July -- iII

Aug - I

Sept ~ I

Ott .-

Nov --

Dec --

Jan --

Feb --

Mar --

Apr --

May --

June --

July --

Aug --.. ,

1:

;;

~~~

%8800

trig:CO.

.-.—— — — ..——— —.—–.-.

..

I

,

I

WSRC-TR-97-O0318

Time (hrs)o 24 48 7’2 96 120 144 168 192 216 240I , P I t ‘! I , I , 1 , I I I , r , I I 0.00

202.00

201.80

FPZO04From 00To 10XI

\

rs 8/11/96W201’96

X

g~ 201.60>q

0.60

%

-“d201.20

201.000 24 48 7’2 “ 96 120 144 168 192 216 240

Time (hrs)...

FQure 18. Continuous water level measurements taken from FPZO04A.

Time (hrs)o 24 48 72 96 120 144 168 192 216 240

I , w I & I , 1 , I s r t I ,1-90.00

189.80 [FPZOJXFrom 0(To 103(

\

,

hrs WI1/!; W20/96

x

n-,

0.60

-’”k-’-”&

189.00

1+

,8880 L-0 24 48 72 96 120 144 168 192 216 240—

Time (hrs)Figure 19. Continuous water level measurements taken from FPZO06A.

—- --

22