A hydrologic analysis was conducted in order to specify important hydrologic parameters of the watershed area. For various storm events, time of concentration, rational coefficient, rainfall intensity, and natural runoff were determined. In the modeling process, the most important parameter was the runoff value for a 25 year storm event (design storm), which was estimated at 1.5 cubic feet per second, respectively, based on the Hydrology Design Manual for Yavapai County. Compared to the pre-development and post-development of the Dewey Site, the magnitude of the watershed area and precipitation intensity kept the same, while the value of the rational coefficient had changed. The essential parameter of the hydrologic analysis can been in the table below. Hydrological parameter values can be found on the documents page by clicking on the final design report icon.
Watershed Area for Dewey Site
A culvert under the driveway should be installed according to Hydrology Design Manual for Yavapai County. Therefore, the crossed arrow team completed a hydraulic analysis to determine compliance with the code. The figure below shows the proposed flow through the culvert after grading. The corresponding decision matrix below can determine the culvert's material to the various criteria.
Proposed flow path through culvert
Plan Set Requirements
Designed according to Yavapai County Standarads
Cut/Fill Quantities
Property Limits
2 Cross sectional Details orthogonal to each other
Required Note
Location of existing structures
+
New neighbors
+
Increase the enrollment at local schools and the
attendance at local churches
+
Increase the local property value
-
Eliminates
neighbors' view
-
Increased
delay
+
Reduce sedimentation
-
Initial
vegetation removal
-
Displacement
of wildlife
-
Increased
noise pollution
-
Increase
fuel consumption
+
Increase revenue for builder of the cabin
+
Increased population of the town
-
Cost
of electricity, water, and the occasional septic tank cleaning
created with
Website Builder Software .
