|
Watershed 14
Physical Characteristics
STREAM: Hugh White Branch
AREA: 61 ha
FIRST RECORD: 05/26/1936
NOTCH: 120 V-notch
ELEV. at WEIR: 707 m
MAX ELEVATION: 992 m
MAX DISCHARGE: 1.11 m3sec-1km-2
ASPECT: NW
Parameters from Swank and Crossly (1988)
Average Annual Nutrient (kg ha-1) and Water (cm) Budget:
|
|
Input
|
Output
|
Net Difference
|
|
Water
|
214
|
119
|
+95
|
|
NO3-N
|
3.15
|
0.05
|
+3.1
|
|
NH4-N
|
2.14
|
0.04
|
+2.10
|
|
PO4-P
|
0.09
|
0.02
|
+0.07
|
|
SO4-S
|
11.34
|
1.89
|
+9.45
|
|
Cl
|
6.98
|
6.44
|
+0.54
|
|
K
|
1.8
|
4.08
|
-2.28
|
|
Na
|
4.51
|
8.73
|
-4.22
|
|
Ca
|
3.83
|
5.28
|
-1.45
|
|
Mg
|
0.88
|
3.25
|
-2.37
|
|
SiO2
|
0.48
|
59.09
|
-58.61
|
Volume-Weighted Mean Annual Concentrations 1973-83:
NO-3-N = 0
NH+4-N = 0
PO3-4-N = 0
Cl- = 0.54
K+ = 0.34
Na+ = 0.74
Ca2+ = 0.45
Mg2+ = 0.27
SO2-4-S = 0.13
SiO2 = 4.98
Some Physiographic and Mean Hydrologic Characteristics:
Land Slope (%) = 49
Record Length (yr) = 44
Mean Annual Precipitation (cm) = 187.55
Mean Annual Runoff (cm) = 98.81
Precipitation Runoff (cm) = 88.74
Hursh's Runoff Coefficient = Mean Annual Runoff/Mean Annual Precipitation
= 0.53
Initial Flow Rate (l/s/km2) = 29.46
Quickflow Before Peak (cm) = 3.3
Quickflow After Peak (cm) = 6.62
Delayed Flow (cm) = 88.9
Storm Duration (hr) = 13.45
Time To Peak (hr) = 4.65
Absolute Peak (l/s/km2) = 81.12
Recession Time (hr) = 8.81
Mean Runoff Events/Year = 80
Response Factor: (Qflow Before Pk + Qflow After Pk) / Mean Annual
Precipitation = 0.05
Hursh's Storm Runoff Ratio: (Qflow Before Pk + Qflow After Pk)/Mean Annual
Runoff = 0.1
Summary of Treatments
Control with mixed hardwood stands remaining undisturbed since 1927.
|