In the year 2003, the American Society of Civil Engineers gave the results of an investigation regarding the sustainable yield of the ancient tropical forest area in the island of Trinidad in Trindad & Tobago.
The results said that while the area has an enormous potential for ecotourism, the underground water resources are very low which affects its carrying capacity touristic activities. They needed to know how to estimate the sustainable yield of the water resources in the area.
A hydrologic similarity method, which is a model of storm runoff production (the water that gets to the underground after it rains) was used to obtain substainable yield of the ungauged rivers. Further, the instream flow was estimated, in the absence of any local criterion, by instream flow incremental methodology.
Bibliography:
Shrivastava, Gyan S. Estimation of Sustainable Yield of Some Rivers in Trinidad. ASCE. Feb 2003. 22 Sep 2010. http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JHYEFF000008000001000035000001&idtype=cvips&gifs=yes&ref=no