The Team:
Logan Palmer
Stephen Bolster
Lindsey Cahoon
Garrett Frame
Erick Conde
Sandra Jose Clases
Australia Ramirez Garcia
Dr. Nelson
Watershed Characteristics:
Introduction:
The River Joca in the Dominican Republic runs
through the South Western portion of the
country near to the border of Haiti. For our
project, we worked together with the
Dominican Republic’s national water agency,
INDRHI, to determine whether or not it would
be feasible to put a dam in the river that would
provide irrigation water, hydroelectric power,
and flood protection.
Using WMS we were able to determine the area of
our watershed to be 220 km2 . Using the data
provided to us we determined that the yearly
average precipitation for this watershed is 82 mm.
Storm Models
Water Availability and Storage
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The yield for the reservoir requires a monthly
average of 7 cms. This comes from 3.6 cms that
would be required for irrigation for the desired
2000 hectares in Sabana Mula, 3 cms for the 80%
normal flow-rate out of the dam from the flow
duration curve, and .4 cms from evaporation and
other factors.
Flow Duration Curve:
400
Flow (cms)
10.0
200
5.0
0.0
0.0
50.0
Percent %
Using the turbine output equation
we determined the output energy
to be 5.7 GW-hr./year.
Mass Curve
0
100.0
Flow (cfs)
15.0
Hydro Power:
To create a model for the watershed WMS and HEC-HMS was
utilized. Inputs for this model included a 30 meter DEM, Shape
files of Land Use, and Soil Type. These were used to develop a
curve number for the basins. The watershed was divided into 8 sub
basins to more accurately route runoff to the outlet. The model was
run using the precipitation return periods as well as the PMP
storms. When run in HMS the hydrographs in the figure above
were developed.
Flood Control:
A GSSHA model was utilized to
provide flood data for the inhabited
area downstream of the dam. The
stream channel cross-sections between
the dam and the cities of Pedro
Santana and Banica were determined
using Google Earth. A fixed discharge
at different levels was released from
the dam until significant flooding
occurred in the cities at 100 cms. A
dam failure was simulated with the
same GSSHA model. The maximum
flooding in the cities from this flood is
depicted in the figure to the right.
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