Watershed 36
Physical Characteristics
STREAM: Pinnacle Branch
AREA: 49 ha
FIRST RECORD: 04/29/1943
NOTCH: 120 V-notch
ELEV. at WEIR: 1021 m
MAX ELEVATION: 1542 m
MAX DISCHARGE: 4.36 m3sec-1km-2
ASPECT: ESEParameters from Swank and Crossly (1988)
Average Annual Nutrient (kg ha-1) and Water (cm) Budget:
| |
Input
|
Output
|
Net
Difference |
|
Water |
225 |
183 |
+42 |
|
NO3-N |
3.25 |
0.14 |
+3.11 |
|
NH4-N |
2.15 |
0.06 |
+2.09 |
|
PO4-P |
0.1 |
0.02 |
+0.08 |
|
SO4-S |
11.77 |
5.53 |
+6.24 |
|
Cl |
6.21 |
9.94 |
-3.73 |
|
K |
2.18 |
5.49 |
-3.31 |
|
Na |
3.89 |
13.79 |
-9.90 |
|
Ca |
4.4 |
10.8 |
-6.40 |
|
Mg |
0.93 |
4.73 |
-3.80 |
|
SiO2 |
0.68 |
106.46 |
-105.78 |
Volume-Weighted Mean Annual Concentrations (mg L-1) 1973-83:
NO-3-N = 0.01
NH+4-N = 0
PO3-4-N = 0
Cl- = 0.54
K+ = 0.54
Na+ = 0.75
Ca2+ = 0.59
Mg2+ = 0.26
SO2-4-S = 0.3
SiO2 = 5.8
Some Physiographic and Mean Hydrologic Characteristics:
Land Slope (%) = 65
Record Length (yr) = 39
Mean Annual Precipitation (cm) = 222.25
Mean Annual Runoff (cm) = 167.51
Precipitation Runoff (cm) = 54.74
Hursh's Runoff Coefficient = Mean Annual Runoff/Mean Annual Precipitation
= 0.75
Initial Flow Rate (l/s/km2) = 40.81
Quickflow Before Peak (cm) = 11.33
Quickflow After Peak (cm) = 25.86
Delayed Flow (cm) = 130.33
Storm Duration (hr) = 26.75
Time To Peak (hr) = 8.02
Absolute Peak (l/s/km2) = 154.05
Recession Time (hr) = 18.73
Mean Runoff Events/Year = 68
Response Factor: (Qflow Before Pk + Qflow After Pk) / Mean Annual
Precipitation = 0.17
Hursh's Storm Runoff Ratio: (Qflow Before Pk + Qflow After Pk)/Mean Annual
Runoff = 0.22
Summary of Treatments
Control, but partially defoliated by fall cankerworm infestation from
1975 to 1979. |