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A STUDY ON SHALLOW SOIL A STUDY ON SHALLOW SOIL PROPERTIES AND WATER PROPERTIES AND WATER
QUALITIES OF SALINE SOIL QUALITIES OF SALINE SOIL AREA IN AMPHOE AREA IN AMPHOE
THATPANOM AND RENU-THATPANOM AND RENU-NAKHON, NAKHON PANOM NAKHON, NAKHON PANOM
PROVINCEPROVINCE
Uma Seeboonruang, KMITLUma Seeboonruang, KMITL
Problem StatementProblem Statement
Project ObjectivesProject Objectives
IndicateIndicate t the salinity distribution both in he salinity distribution both in soil and surface water.soil and surface water.
Establish the relationship between soil Establish the relationship between soil salinity and other soil and groundwater salinity and other soil and groundwater properties.properties.
Study AreaStudy Area
MethodologyMethodology
Data Collection
Profile Soil Sampling
Surface & Ground Water Sampling
Sampling Location Determinations
Soil Experiments
In-situ measurement
Physical Properties
Chemical Properties
Chemical Properties
Simple & Multiple Linear Regression
Salinity Prediction Model
Results : Soil SalinityResults : Soil Salinity
Salinity(ppm)
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0.45
0.0
0-0
.85
0.8
5-1
.40
1.4
0-1
.90
1.9
0-2
.40
2.4
0-2
.60
2.6
0-3
.15
0.0
0-0
.85
0.8
5-1
.30
1.3
0-1
.75
1.7
5-2
.35
2.3
5-2
.65
2.6
5-3
.00
0.0
0-0
.20
0.2
0-0
.60
0.6
0-1
.35
1.3
5-1
.85
1.8
5-2
.02
2.0
2-2
.64
2.6
4-2
.96
2.9
6-3
.65
3.6
5-3
.90
0.0
0-0
.45
0.4
5-2
.45
2.4
5-6
.45
6.4
5-8
.45
8.4
5-1
0.4
5
0.0
0-1
.45
1.4
5-3
.45
3.4
5-4
.45
4.4
5-7
.45
7.4
5-1
0.4
5
0.0
0-1
.45
1.4
5-4
.45
4.4
5-6
.45
6.4
5-8
.45
8.4
5-1
0.4
5
เขื่�� อนดิ�น ปากบั ง โ คกสว่�าง พิ�มาน ขื่อนกอง ว่ ดิสว่�าง
Below 138 m.msl.
Din Dam Pak Bang Kok Sawang Piman Khon Kong
W. Sawang
Salinity(ppm)
0
500
1000
1500
2000
2500
3000
0.0
0 -
0.2
0
0.2
0 -
0.4
5
0.4
5 -
0.7
0
0.7
0 -
1.0
0
0.0
0 -
0.1
5
0.1
5 -
0.4
5
0.4
5 -
0.6
0
0.6
0 -
1.0
5
1.0
5 -
1.5
5
1.5
5 -
2.4
0
2.4
0 -
3.2
0
0.0
0 -
0.9
0
0.9
0 -
1.0
0
1.0
0 -
1.2
0
1.2
0 -
1.6
5
1.6
5 -
1.9
5
1.9
5 -
2.2
0
0.0
0 -
0.4
5
0.4
5 -
1.1
0
1.1
0-
2.3
0
2.3
0 -
2.4
5
2.4
5 -
3.4
5
0.0
0 -
1.1
0
1.1
0 -
2.1
0
2.1
0 -
3.4
5
3.4
5 -
4.4
5
4.4
5 -
5.4
5
0.0
0 -
0.1
5
0.1
5 -
0.4
5
1.1
0 -
1.5
0
1.5
0 -
2.3
0
2.3
0 -
3.2
5
3.2
5 -
4.0
0
0.0
0 -
0.4
5
0.4
5 -
1.5
0
1.5
0 -
6.4
5
6.4
5 -
11.0
0
ดิงมะ เอก บั�อดิอกซ้�อน พิระซ้องน�อย น��าบั�อ1 น��าบั�อ2 ฉั นทะ ดิงมะ เอก2
Above 138 m.msl.
Dong Ma Eak
Bo Dok Sorn Pra Song Noi
Nam Bo Nam Bo Chan Ta Dong Ma Eak
Results : Groundwater SalinityResults : Groundwater Salinity
Locations Depth (m)Salinity (ppm) pH EC (uS/cm) TDS(ppm)
Kheun Din 0.8 0 5.3 5.5 2.76Ban Pak Bang 1.2 0 4.7 236.0 116.00
Ban Kok Sawang 0.4 - - - -Ban Pimai 0.9 0 5.6 273.0 173.00
Ban Khon Kong 4.9 - - - -Wat Sawang Arom 1.5 0 5.6 132.0 66.90Ban Dong Ma Eak 1.2 100 5.8 53.6 24.60Ban Bo Dong Sorn 1.5 4500 3.9 17010.0 9260.00Ban Pra Song Noi 1.5 7700 6.8 35700.0 18100.00
Ban Nam Bo I 0.9 100 8.0 326.0 490.00Ban Nam Bo II 0.9 6800 6.6 27200.0 14000.00Ban Chan Ta Pump Well 1800 6.8 7860.0 3970.00
Results: Surface water salinityResults: Surface water salinity
Analysis: Simple Linear Analysis: Simple Linear RegressionRegression
0
500
1000
1500
2000
2500
3000
0 20 40 60
LL (%)
TDS
(ppm
)
Above 138 mmsl
Below 138 mmsl
0
500
1000
1500
2000
2500
3000
0 20 40 60 80 100
#200
TDS
(ppm
)
Above 138 mmsl
Below 138 mmsl
0
500
1000
1500
2000
2500
3000
-10 -5 0 5 10 15
Relative Depth (m)
TDS
(ppm
)
Above 138 mmsl
Below 138 mmsl
0
500
1000
1500
2000
2500
3000
0 5000 10000 15000 20000
GW TDS (ppm)
TDS
(ppm
)
Above 138 mmsl
Below 138 mmsl
Analysis: Multiple Linear Analysis: Multiple Linear RegressionRegression
SUMMARY OUTPUT
Regression Statistics
Multiple R 0.766011472
R Square 0.586773576
Adjusted R Square 0.540231371
Standard Error 507.4115402
Observations 62
ANOVA
df SS MS F Significance F
Regression 5 20839053.95 4167810.791 16.18778077 7.49744E-10
Residual 57 14675588.85 257466.4711
Total 62 35514642.81
Independent Parameters Soil specific gravity
Groundwater TDS
Liquid limit
Water content
Relative depth
#200 passing
Dependent Parameter Soil TDS
Coefficients Standard Error t Stat P-value
Intercept 0 - - -
Water 23.69852903 7.62232592 3.109094163 0.002927456
GS -576.9689036 136.8429922 -4.216283892 8.97406E-05
LL 33.42934495 9.465918762 3.531547839 0.000826068
Relative Depth -65.10082996 30.29328032 -2.149018835 0.035892808
TDS 0.045555419 0.012897392 3.532141883 0.00082455
Water Content Line Fit Plot
0
1000
2000
3000
0 10 20 30 40 50 60
Water Content
TDS
TDS
Predicted TDS
GS Line Fit Plot
0
1000
2000
3000
2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9
GS
TDS
LL Line Fit Plot
0
1000
2000
3000
0 10 20 30 40 50 60
LL
TDS
Rel Depth Line Fit Plot
0
1000
2000
3000
-10 -5 0 5 10 15
Rel Depth
TDS
GW TDS Line Fit Plot
0
1000
2000
3000
0 5000 10000 15000 20000
GW TDS
TDS
Soil TDS = 23.699 - 576.969 GS + 33.429 LL
- 65.100 Rel. Depth + 0.046 GW
TDS
Salinity = 0.797 TDS - 19.257
SummarySummary
Soil salinity is found in the area located Soil salinity is found in the area located above the 138 m.msl. and none is found in above the 138 m.msl. and none is found in the area below the contour line. the area below the contour line.
Highest salinity is found at Bo Dok Sorn Highest salinity is found at Bo Dok Sorn and Pra Song Noi.and Pra Song Noi.
Salinity is found in the surface water Salinity is found in the surface water nearby Dong Ma Eak, but little in the soil nearby Dong Ma Eak, but little in the soil and groundawter.and groundawter.
Summary (continued)Summary (continued)
No apparent relationship between soil No apparent relationship between soil salinity and other parameters when salinity and other parameters when analyzed by simple linear regression.analyzed by simple linear regression.
Increases in groundwater salinity and liquid Increases in groundwater salinity and liquid limit may have an influence on soil salinity. limit may have an influence on soil salinity.
Soil specific gravity, groundwater TDS, Soil specific gravity, groundwater TDS, liquid limit, water content, and relative liquid limit, water content, and relative depth are found to correlate with soil depth are found to correlate with soil salinitysalinity
Future ResearchFuture Research
Additional soil and water sampling and Additional soil and water sampling and testings.testings.
Shallow groundwater flow direction and Shallow groundwater flow direction and salinity distribution.salinity distribution.
Agricultural practices.Agricultural practices.
AcknowledgementAcknowledgement
Research Support Budget Research Support Budget
Fiscal year 2006 of Fiscal year 2006 of
Faculty of Engineering, Faculty of Engineering,
King Mongkut’s Institute of King Mongkut’s Institute of Technology Ladkrabang, Technology Ladkrabang,
ThailandThailand
Din Dam
Khon Kong
Piman
Kok Sawan
g
Wat Sawan
gPak Bang
Pra Song Noi
Bo Dok Sorn
Nam Bo
Chan Ta
Dong Ma Eak