Table 1. Water properties and major ion concentrations, Comal Springs riverine system, New Braunfels, Texas, 1993–94.
[mS/cm, microsiemens per centimeter at 25 °C; °C, degrees Celsius; mg/L, milligrams per liter; CaCO3, calcium carbonate; <, less than; NA, not available; ft3/s, cubic feet per second]
|
Constituent |
New Channel |
Comal River1 |
||||||
| Site A | Site B | Site E | ||||||
| Summer (9/20/93) |
Winter (2/3/94) |
Summer (9/20/93) |
Winter 2/3/94) |
Summer (9/20/93) |
Winter (2/3/94) |
|||
|
Specific conductance (mS/cm) |
548 |
509 |
547 |
509 |
544 |
514 |
||
|
pH (standard units) |
7.6 |
7.4 |
7.8 |
7.3 |
7.8 |
7.1 |
||
|
Temperature (°C) |
24 |
23 |
24 |
22.5 |
24.5 |
22 |
||
|
Dissolved oxygen (mg/L) |
7.2 |
8.2 |
9 |
9.5 |
9 |
9.4 |
||
|
Calcium, dissolved (mg/L) |
83 |
82 |
81 |
82 |
80 |
82 |
||
|
Magnesium, dissolved (mg/L) |
16 |
16 |
16 |
16 |
16 |
16 |
||
|
Sodium, dissolved (mg/L) |
9.9 |
9.7 |
11 |
10 |
10 |
10 |
||
|
Potassium, dissolved (mg/L) |
.7 |
1.3 |
.7 |
1.3 |
.7 |
1.3 |
||
|
Alkalinity (mg/L as CaCO3) |
230 |
230 |
230 |
230 |
240 |
230 |
||
|
Sulfate, dissolved (mg/L) |
23 |
24 |
24 |
24 |
23 |
24 |
||
|
Chloride, dissolved (mg/L) |
15 |
16 |
15 |
16 |
15 |
16 |
||
|
Fluoride, dissolved (mg/L) |
.2 |
.2 |
.2 |
.2 |
.2 |
.2 |
||
|
Silica, dissolved (mg/L) |
12 |
11 |
12 |
11 |
12 |
11 |
||
|
Dissolved solids, sum of constituents (mg/L) |
307 |
309 |
308 |
309 |
307 |
310 |
||
| Constituent |
Old Channel |
Comal River1 |
||||||
|
Site C |
Site D |
Site E |
||||||
| Summer (8/20/93) |
Winter (3/3/94) |
Summer (8/20/93) |
Winter (3/3/94) |
Summer |
Winter (3/3/94) |
|||
|
Specific conductance (mS/cm) |
552 |
529 |
565 |
523 |
547 |
541 |
||
|
pH (standard units) |
7.7 |
6.9 |
7.5 |
7.3 |
7.6 |
7.3 |
||
|
Temperature (°C) |
24 |
21.5 |
25.5 |
20.5 |
26 |
23 |
||
|
Dissolved oxygen (mg/L) |
8.1 |
11.4 |
4.4 |
11.8 |
9.2 |
12 |
||
|
Calcium, dissolved (mg/L) |
83 |
82 |
85 |
81 |
84 |
81 |
||
|
Magnesium, dissolved (mg/L) |
16 |
16 |
16 |
16 |
16 |
16 |
||
|
Sodium, dissolved (mg/L) |
9.6 |
10 |
10 |
11 |
9.5 |
11 |
||
|
Potassium, dissolved (mg/L) |
1.9 |
1.3 |
1.6 |
1.3 |
<.10 |
1.3 |
||
|
Alkalinity (mg/L as CaCO3) |
230 |
240 |
240 |
240 |
230 |
240 |
||
|
Sulfate, dissolved (mg/L) |
25 |
24 |
26 |
24 |
25 |
24 |
||
|
Chloride, dissolved (mg/L) |
16 |
15 |
16 |
16 |
16 |
15 |
||
|
Fluoride, dissolved (mg/L) |
.3 |
.2 |
.2 |
.2 |
.2 |
.2 |
||
|
Silica, dissolved (mg/L) |
12 |
12 |
11 |
10 |
12 |
11 |
||
|
Dissolved solids, sum of constituents (mg/L) |
309 |
310 |
314 |
310 |
NA |
309 |
||
1Daily mean flow, 08169000 Comal River at New Braunfels: 350 ft3/s - 8/20/93, 339 ft3/s - 9/20/93, 351 ft3/s - 2/3/94, 337 ft3/s - 3/3/94.
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