NDLI: A Comprehensive Study of the Effect of Input Data on Hydrology and non-point Source Pollution Modeling

Content Provider	Springer Nature Link
Author	Wang, Huiliang Wu, Zening Hu, Caihong
Copyright Year	2014
Abstract	Watershed models have been applied to develop management strategies for water resources, but its effectiveness is limited by predictive uncertainties associated with input data. In this study, we focus on the effect of uncertainty in spatial distribution of rainfall and DEM resolution on hydrology and non-point source pollution (H/NPSP) modeling of a large watershed. The uncertainty introduced by spatial distribution of rainfall was determined by the density of raingauge network, which were estimated by Thiessen polygon method. A range of 16 DEM spatial resolutions, from 30 to 480 m, was examined, and the annual and monthly model outputs based on each resolution were compared. The Hydrologic Simulation Program-FORTRAN (HSPF) was used to quantify the effect of input data uncertainty on watershed H/NPSP modeling of the Yixunhe watershed in China. Results indicated that the rainfall and DEM resolution could contribute significant uncertainty in model input information and the carry-magnify effect caused even larger uncertainty in the H/NPSP modeling. This uncertainty was magnified from hydrology modeling (stream flow) into NPSP modeling (TP, TN, NO$_{3}$-N and NH$_{3}$-N). From a practical point of view, it is indicated that every effort must be made to collect spatial data at high resolution to minimize uncertainty in model simulations. The results of this study provide useful information for better understanding and estimating uncertainties in the HSPF model.
Starting Page	1505
Ending Page	1521
Page Count	17
File Format	PDF
ISSN	09204741
Journal	Water Resources Management
Volume Number	29
Issue Number	5
e-ISSN	15731650
Language	English
Publisher	Springer Netherlands
Publisher Date	2014-12-11
Publisher Institution	European Water Resources Association (EWRA)
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Uncertainty Rainfall DEM Hydrology Non-point source pollution HSPF model Hydrogeology Hydrology/Water Resources Geotechnical Engineering & Applied Earth Sciences Atmospheric Sciences Civil Engineering Environment
Content Type	Text
Resource Type	Article
Subject	Water Science and Technology Civil and Structural Engineering

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