@article{fdi:010058818,
  title = {{E}valuating {DEM} source and resolution uncertainties in the {S}oil and {W}ater {A}ssessment {T}ool},
  author = {{L}in, {S}. {P}. and {J}ing, {C}. {W}. and {C}oles, {N}. {A}. and {C}haplot, {V}incent and {M}oore, {N}. {J}. and {W}u, {J}. {P}.},
  editor = {},
  language = {{ENG}},
  abstract = {{DEM}s as important input parameters of environmental risk assessment models are notable sources of uncertainties. {T}o illustrate the effect of {DEM} grid size and source on model outputs, a widely used watershed management model, the {S}oil and {W}ater {A}ssessment {T}ool ({SWAT}), was applied with two newly available {DEM}s as inputs (i.e. {ASTER} {GDEM} {V}ersion 1, and {SRTM} {V}ersion 4.1). {A} {DEM} derived from 1:10,000 high resolution digital line graph ({DLG}) was used as a baseline for comparisons. {E}leven resample resolutions, from 5 to 140 m, were considered to evaluate the impact of {DEM} resolution on {SWAT} outputs. {R}esults from a case study in {S}outh-eastern {C}hina indicate that the {SWAT} predictions of total phosphorus and total nitrogen decreased substantially with coarser resample resolution. {A} slightly decreasing trend was found in the {SWAT} predicted sediment when {DEM}s were resampled to coarser resolutions. {T}he {SWAT} predicted runoff was not sensitive to resample resolution. {F}or different data sources, {ASTER} {GDEM} did not perform better than {SRTM} in {SWAT} simulations even it was provided with a smaller grid size and higher vertical accuracy. {T}he predicted outputs based on {ASTER} {GDEM} and {SRTM} were similar, and much lower than the ones based on {DLG}. {T}his study presents potential uncertainties introduced by {DEM} resolutions and data sources, and recommends strategies choosing {DEM}s based on research objects and maximum acceptable errors.},
  keywords = {{DEM} resolution ; {SWAT} ; {M}odel uncertainty ; {ASTER} {GDEM} ; {SRTM} ; {CHINE}},
  booktitle = {},
  journal = {{S}tochastic {E}nvironmental {R}esearch and {R}isk {A}ssessment},
  volume = {27},
  numero = {1},
  pages = {209--221},
  ISSN = {1436-3240},
  year = {2013},
  DOI = {10.1007/s00477-012-0577-x},
  URL = {https://www.documentation.ird.fr/hor/fdi:010058818},
}