A comprehensive calibration and validation of SWAT-T using local datasets, evapotranspiration and streamflow in a tropical montane cloud forest area with permeable substrate in central Veracruz, Mexico

JOURNAL OF HYDROLOGY

卷:603

Article

Lopez-Ramirez, Sergio Miguel¹  Mayer, Alex²  Saenz, Leonardo¹  Elena Munoz-Villers, Lyssette³  Holwerda, Friso³  Looker, Nathaniel⁴  Schurz, Christoph⁵  Berry, Z. Carter⁶  Manson, Robert⁷  Asbjornsen, Heidi⁸  Kolka, Randall⁹  Geissert, Daniel⁷  Lezama, Carlos⁷ 

[1] Michigan Technol Univ, Civil & Environm Engn, 870 Dow Environm Sci,1400 Townsend Dr, Houghton, MI 49931 USA

[2] Univ Texas El Paso, Civil Engn, 500 West Univ Ave, El Paso, TX 79968 USA

[3] Univ Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Ciudad De Mexico, Mexico

[4] Univ Minnesota, Dept Soil Water & Climate, St Paul, MN 55108 USA

[5] Univ Nat Resources & Life Sci Vienna, Inst Water Management Hydrol & Hydraul Engn, Gregor Mendel Str 33, A-1180 Vienna, Austria

[6] Chapman Univ, Schmid Coll Sci & Technol, Orange, CA 92866 USA

[7] Inst Ecol AC, Carretera Antigua Coatepec 351, Xalapa 91073, Veracruz, Mexico

[8] Univ New Hampshire, Dept Nat Resources & Environm, Durham, NH 03824 USA

[9] US Forest Serv, USDA, Northern Res Stn, Grand Rapids, MN 55744 USA

关键词: Streamflow;    Catchment hydrological modeling;    Potential evapotranspiration;    Rainfall interception;    Tropical montane forests;   

DOI  :  10.1016/j.jhydrol.2021.126781

来源: Elsevier

【 摘 要 】

Tropical montane cloud forests (TMCF) are threatened ecosystems despite their capacity to maintain high dry-season baseflow. A number of conservation policies, including payments for hydrological services, have been implemented to protect these forests. However, since most of the modeling tools used to assess the impacts of these policies were developed for temperate zones, more work is needed to understand and improve the applicability of popular models in tropical contexts. This study uses local evapotranspiration and streamflow datasets to calibrate and validate an improved version of the Soil and Water Assessment Tool model for the Tropics (SWAT-T). Vegetation growth and canopy water storage capacity were calibrated using field data. Three methods provided by SWAT-T to calculate potential evapotranspiration (PET) were compared: Penman-Monteith (SWAT-T-PM), Hargreaves (SWAT-T-HA), and Priestly-Taylor (SWAT-T-PT). Sensitivity analysis and calibration of daily streamflow were conducted at the catchment scale (34 km(2)). Furthermore, the calibrated models were validated at three sites with evapotranspiration data, and at four distinct micro-catchments (0.137-0.446 km(2)) with gauged streamflow data. Overall, SWAT-T satisfactorily simulated streamflow during the calibration period producing acceptable goodness of fit indices. However, the model incorrectly predicted the dominance of lateral flow instead of the deep groundwater flow observed from isotope-based studies. SWAT-T-HA performed better than SWAT-T-PM and SWAT-T-PT, but all models underestimated the influence of rainfall interception losses since evaporation is limited by daily PET in forests. Finally, SWAT-T largely over- and underestimated mean annual daily low flow in pastures and forests, respectively. Taken together, these results indicate that improvements in the parametrization of rainfall interception and deep subsurface flow dynamics in SWAT-T are required to improve applicability of this modeling tool in tropical montane areas underlain by permeable substrates.

【 授权许可】

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