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| Titel: |
An integrated modelling system for management of the Patuxent River estuary and basin, Maryland, USA |
| Auteur: |
Williams, M. R. Fisher, T. R. Boynton, W. R. Cerco, C. F. Kemp, M. W. Eshleman, K. N. Kim, S-C. Hood, R. R. Fiscus, D. A. Radcliffe, G. R. |
| Verschenen in: |
International journal of remote sensing |
| Paginering: | Jaargang 27 (2006) nr. 17 pagina's 3705-3726 |
| Jaar: |
2006-09-01 |
| Inhoud: |
The Patuxent River watershed is a heavily impacted basin (2290 km2) and estuarine tributary (120 km2) of the Chesapeake Bay, USA. To assist management of the basin, we are testing a coupled modelling system composed of a watershed model (HSPF), an estuarine circulation model (CH3D), and an estuarine water-quality model (CE-QUAL-ICM). The modelling system is being tested to guide the development of Total Maximum Daily Loads (TMDLs), and therefore errors in the models must be carefully evaluated. A comparison of daily total nitrogen (TN) concentrations simulated in HSPF with observations indicated that there was no significant bias, with an rms error of 37%. In contrast, modelled total phosphorus (TP) and total suspended solids (TSS) had significant bias with larger rms errors (65% and 259%, respectively). In the estuary, CH3D accurately simulated tides, temperature, and salinity. CE-QUAL-ICM overestimated nitrogen (N) and phosphorus (P) in the upper estuary and underestimated in the lower estuary, primarily because intertidal marshes are not currently a model component. Model errors declined from short (≤1 day) to long (multi-year) timescales as under- and overestimations cumulatively cancelled. Watershed model errors propagate into the estuarine models, interacting with each subsequent model's errors, which limits the effectiveness of this TMDL management tool at short timescales. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 21 van 268 gevonden artikelen
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