Rehabilitating a Watershed in the Dominican Republic
By Jan Surface, F2F Volunteer in the Dominican Republic
This past January, F2F volunteer, Jan Marie Surface traveled
to the Dominican Republic, where she worked with Plan Yaque on recommendations
to improve water quality within the Yaque del Norte watershed. Plan Yaque is a non-governmental
institution that combines efforts between the State and Civil Society for the
protection, conservation, and sustainable management of natural resources of
the Yaque del Norte River Basin. Its fundamental purpose is to contribute to
regional and national development towards the construction of a better and
sustainable quality of life in the Dominican Republic.
During her stay, Jan Marie provided examples on how to set up photo-monitoring points;
a list of references for best management practices to improve water quality,
tips for writing grants, equipment recommendations for their new water quality
lab, and UV treatment recommendations.
One of the
highlights of her trip, was meeting
with Williams Hernandez (Plan Yaque Coordinator of Water and Sanitation
Program) to
see a septic tank plus wetland cell treatment system currently under construction
for sewage treatment at the newly constructed relocation community for families
who are currently living illegally in a National Park. Fifty-two houses have
been constructed for 350 people and each family will be provided 629m2
of land for agricultural production.
[Left] 6-cell septic tank under construction [Right] Jan Marie Surface (blue hat on left) discusses system with Williams Hernandez (Plan Yaque; orange hard hat) and resident workers |
The wastewater treatment
system for the project is designed as a gravity flow system starting with a 6 cells
septic tank to settle out all the solids and begin anaerobic digestion. The
liquid waste will then flow through a constructed wetland consisting of a
gravel substrate and vetiver plants. The wetland treatment system was sized
(load calculations) and designed by Plan Yaque staff. As designed, the
treatment system will address nutrient issues, but it will not treat bacteria.
Jan Marie researched alternatives for providing tertiary Ultra Violet bacteria
treatment and provided those recommendations to Plan Yaque.
[Left] Williams Hernandez (Plan Yaque) and Jan Marie Surface (F2F volunteer) discuss wetland treatment system [Right] Wetland cell has been leveled and is ready for gravel substrate and plants. |
Jan Surface is a watershed planning specialist at the Natural Resources Conservation Service in Little Rock, Arkansas. This was her second F2F trip to the Dominican Republic and assignment with Plan Yaque on this topic.
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