Nutrients and Suspended Sediment Load Estimates for the Ishikari River Basin, Japan, Over a Decade
Year: 2013
Type: article
Abstract: The load estimation process for nutrients (nitrogen and phosphorus) and suspended sediment (SS) is complicated because of retransformation bias, data censoring, and non-normality. To obtain reliable unbiased estimates, the regression model Load Estimator (LOADEST) was applied to estimate total nitrogen (TN), total phosphorus (TP) and SS loads at five sites in the Ishikari River Basin, Japan, from 2000 to 2010. Coefficients of determination (R2) for the best-fit regression models for loads of TN, TP, and SS for the five sites ranged from 75.36 % to 92.37 %, suggesting the model for all three constituents successfully simulated the variability in constituent loads at all sites. Moreover, the estimated seasonal loads fluctuated widely during 2000 to 2010, with the greatest loads occurring in spring and the smallest loads occurring in winter. Accurately estimated loads are essential for effective water resources management efforts.
Authors: Weili Duan, Kaoru Takara, Bin He, Pingping Luo, Daniel Nover, Yosuke Yamashiki
Language: English
Subfield: Environmental Chemistry
Field: Environmental Science
Domain: Physical Sciences
Open Access status: green
Award: G8791194948
OpenAlex ID: W2101637540