Watershed Health Report

Little Sioux River Watershed

HUC 8: 10230003  DNR Major: 84
Major River Basin: Missouri River

Area: 321 square miles
Stream Length: 328 miles
Lakes Area: 6,834 acres

Watershed Mean Health Score: 45

download health report (PDF/0.5MB)


Overall Watershed Score
Mean Watershed Score:
|
45
Minimum Index Score:
|
2
Hydrology Health Scores
Mean Watershed Score:
|
59
Minimum Index Score:
|
8
Index:
Perennial Cover:
|
8
Impervious Surface:
|
89
Water Withdrawal:
|
100
Hydrologic Storage:
|
37
Flow Variability:
|
61
Geomorphology Health Scores
Mean Watershed Score:
|
68
Minimum Index Score:
|
55
Index:
Soil Erodability:
|
73
Groundwater Contamination:
|
55
Climate Vulnerability:
|
75
Biology Health Scores
Mean Watershed Score:
|
33
Minimum Index Score:
|
2
Index:
Terrestrial Habitat Quality:
|
2
Stream Species:
|
66
Species Richness:
|
49
At-Risk Species:
|
16
Connectivity Health Scores
Mean Watershed Score:
|
18
Minimum Index Score:
|
2
Index:
Terrestrial Habitat Connectivity:
|
2
Aquatic Connectivity:
|
7
Riparian Connectivity:
|
46
Water Quality Health Scores
Mean Watershed Score:
|
49
Minimum Index Score:
|
15
Index:
Non-Point Source:
|
15
Point Source:
|
88
Water Quality Assessment:
|
45

WAT Score
The Watershed Assessment Tool measures five components of watershed health. These components are: Hydrology, Geomorphology, Biology, Connectivity and Water Quality. Each component contains 3-5 health index scores. The index scores are combined to create a component score. The component scores are also combined into an overall mean (average) watershed health score; and the index identified with lowest score is the watershed minimum health score.
 
Please go to the Watershed Health Assessment Results page for more information.