Estimation method of effluent load from catchment and its uncertainty
2006
Tada, A.(Kobe Univ. (Japan). Faculty of Agriculture) | ; Tanakamaru, H. | ; Hata, T.
By far, the effluent loads from catchment have been estimated by many ways. Uncertainties of estimated loads hindered the utilizations and comparisons of estimated values because uncertainties of the estimated values had not been studied sufficiently in Japan. On the contrary, uncertainties inherent in the loads estimation methods have been studied in the last 30 years and the importance of evaluating uncertainties in loads estimates has widely recognized especially after 1998 when TMDLs were started in USA. This paper reviews major and representative studies evaluating uncertainties in effluent loads estimates from the catchments in USA. This review also aims to present the loads estimation method that is currently considered most unbiased, as a combination of calculation method with sampling strategy. Recent techniques to estimate the unbiased loads from catchment and to deduce the variability of estimator will be presented.
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