Hydrological simulation in a basin of typical tropical climate and soil using the SWAT model part I: Calibration and validation tests

Abstract

Pomba river basin Maximum annual daily streamflows Minimum annual daily streamflow Split sample test Proxy basin test a b s t r a c t Study region: The study was developed for fhe Pomba River Basin, which is located in southeast region of Brazil in the continent of South America. Study focus: This study aimed to (a) calibrate and validate the SWAT model for a sub-basin of Pomba River Basin, (b) validate it for use with upstream and downstream control sections and (c) validate it for sub-basins other than the one where calibration was performed. This was done with the goal of having a model that can be used for the estimation of water availability and the planning of soil use and occupation. The model was calibrated by trial and error during the period from the maximum, average and minimum annual daily streamflows were evaluated based on the paired t-test and linear regression analysis. New hydrological insights: The SWAT model was qualified for simulating the Pomba River sub-basin in the sites where rainfall representation was reasonable to good. The model can be used in the simulation of maximum, average and minimum annual daily streamflow based on the paired t-test, contributing with the water resources management of region, although the model still needs to be improved, mainly in the representativeness of rainfall, to give better estimates of extreme values.

The Effect of Climate Change on Loss of Lake Volume: Case of Sedimentation in Central Rift Valley Basin, Ethiopia

“…The results showed a good agreement between the observed and simulation values for calibration and validation periods, with R 2 and E NS indicated in Table 4. According to Pereira et al [45], the model performance for sediment yield estimation was in the satisfactory range. The model performance efficiency for the calibration and validation periods was lower for the Ketar River as compared to the Meki River.…”

“…For the purpose of this study, performance efficiency as recommended by Ayele et al [25] and Pereira et al [45] was used. The objective function can be further elaborated quantitatively and qualitatively as: E NS > 0.75 (good); 0.36 < E NS < 0.75 (satisfactory); and E NS < 0.36 (unsatisfactory).…”

Spatially distributed tracer‐aided modelling to explore water and isotope transport, storage and mixing in a pristine, humid tropical catchment

“…More physically based and complex models such as soil and water assessment tool (SWAT) were also widely applied for simulating hydrologic behaviour of tropical catchments (Pereira, Martinez, Pruski, & da Silva, 2016, for an example from Brazil). However, Kirchner (2006) pointed out that successful hydrograph simulations for smaller catchments can be misleading and often result in overfitted complex models.…”

Análise de sensibilidade e calibração espacial do modelo SWAT aplicado em uma bacia do litoral pernambucano através de dados climáticos observados e de reanálise (Analysis of sensitivity and calibration of the SWAT model applied in a basin in northeast of Brazil using observed and reanalysis climatic data)

“…For Nossent, Elsen and Bauwens (2011) the most sensitive parameters were CN2, CH_N and GWQMN for stream flow calibration. Pereira et al (2016) worked in the Pomba River basin in southeastern Brazil and identified SOL_K, APLHA_BF, ESCO, CN2, CH_N2, SOL_AWC and SOL_Z as sensitive parameters. For Andrade, Mello and Beskow (2013) the most sensitive parameters found for the Jaguara River Basin in the Rio Grande High region of Minas Gerais were CN2, ALPHA_BF, RCHRG_DP, ESCO, SOL_Z, SOL_K, SOL_AWC.…”