identifying water-quality domains near ichetucknee springs, columbia county, florida
DESCRIPTION
Identifying Water-Quality Domains near Ichetucknee Springs, Columbia County, Florida. By Sam B. Upchurch, Jim Schneider, Kyle M. Champion, David Hornsby, Ron Ceryak, and Warren Zwanka. Ichetucknee Springs. 1 st magnitude springs in the Suwannee Basin. - PowerPoint PPT PresentationTRANSCRIPT
Identifying Water-Quality Identifying Water-Quality Domains near Ichetucknee Domains near Ichetucknee Springs, Columbia County, Springs, Columbia County,
FloridaFlorida
By Sam B. Upchurch, Jim Schneider,
Kyle M. Champion, David Hornsby,
Ron Ceryak, and Warren Zwanka
1st magnitude springs in the Suwannee Basin
Ichetucknee Springs
Cody Scarp
Lake City
Location of wells and springs within the study area
Methods of Investigation
Factor Analysis
Hierarchical Analysis
Star Diagrams
WATEQ4F
Factor Analysis
• Six factors explain ~ 76% of total
variance.
• Factor I - Alkalinity, Spec. Cond., Calcium, & TDS (dissolution of calcite)
• Factor II – Silica, Magnesium, Fluoride, & Sodium (weathering of Hawthorn Group clays)
• Factor III- Ammonia & TOC (organic-rich recharge)
Factor Analysis
• Factor IV – Chloride, Sulfate,
& Potassium (deep flow)
• Factor V – Phosphorus, (-pH), & Sodium (well construction?)
• Factor VI – Iron, (-Nitrate) & Temperature (shallow/deep flow or recharge)
Factor I – Alkalinity, Calcium, Spec. Cond., & TDS
Low scores in Cody Scarpsuggests rapid recharge
Factor II – Silica, Magnesium, Fluoride, & Sodium
Highest scores in Highlands
Factor IV – Chloride, Sulfate Potassium, & TDS
Highest scores near streamsand possibly deep flow
Star Diagrams
• Graphic representation of six water-quality factors.
• Three water-quality domains
1) Northern Highlands
2) Discharge zones along major streams/rivers
3) Gulf Coast Lowlands
Star Diagrams
AlkCl
MgNO3
NH3
P
Alk
Mg
Alk
NO3
NH3
Alk
P
Star Diagrams
2
3
4
5
67 8
910 11
1213
14
16
17
1819
20
21
22
23
24
25
92
93
94
95 96
97
AlkCl
MgNO3
NH3
P
Star Diagrams
31
3233
39
40
41
48
49
5051
52
53
54
55
5657
58
59
6061
62
63
64
6768
69
70
71
72
73
7475
76
77
78
79
80
81
82
83
84
85
86
87
88
B
C
D
E
F
A
AlkCl
MgNO3
NH3
P
Hierarchical Analysis
• Using factor variables, cluster samples into similar groupings.
• Factor variables included:Alkalinity, chloride, magnesium,
nitrate, ammonia, and phosphorus
• Clustering suggests three distinct water-quality groupings within the study area.
Dendogram for water-quality data in the study area
A
B
C D
E F
Water-quality data in the study area
E
D
C
F
CC F
ED D
CA
A
D
F
DD
F
E
D
F
F
F
D A
D E
F
F
ED
E
E
A
A
D
D
D
D DB
D
B
B
93
F
B D
E
AlkCl
MgNO3
NH3
P
Water-quality data in the study area
E
DD
E
D
D
D
E
DE
E
D
D
D
DF
E
E
DE
E
E
E
CC
C
D
D
D
D
DD
D
E
D
D
C
F
D
E
E
C
C
E
C
D
C
C
C
C
D
AlkCl
MgNO3
NH3
P
Water quality at the springs
• Factor analysis indicates similarity in ground-water chemistry
• Hierarchical analysis places springs in one major cluster.
• Similarity of star diagrams suggests local recharge origin/flowpaths
WATEQ4F Analysis
• At or near saturation w/ respect to calcite
• Undersaturated in areas of the Cody Scarp
• Greatest saturation occurs along Suwannee/Sante Fe river corridors
Saturation indices in the study area
Summary
• Six factors account for more than 76% of the variability.
• Factors are tied to water-rock interactions, recharge characteristics, and flow-paths in the aquifer.
• Three major water-quality domains characterize the Ichetucknee Springs ground-water basin.
Summary
• Domains extend over a wide range and overlap to some degree.
• Using star diagrams, distinct water-quality domains are evident near the springs.
• Much of the ground-water in the region is at or near saturation, except for areas in and near the Cody Scarp.
Questions