author = "Santos, Vanessa C. dos and Laurent, Fran{\c{c}}ois and Messner, 
                         Fran{\c{c}}ois and Abe, Camila Andrade and Meireles, Ana C.",
          affiliation = "{Universit{\'e} du Maine} and {Universit{\'e} du Maine} and 
                         {Universit{\'e} du Maine} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {Universidade Federal do Cariri}",
                title = "Land use change effects on hydrological regime in the Xingu 
                         Watershed - Brazil",
                 year = "2017",
         organization = "International SWAT Conference and Workshops",
             keywords = "Land-use change, streamflow, SWAT model, scenarios, Amazon region, 
                         Xingu watershed.",
             abstract = "Accelerated land use change in the Amazon biome over the last 
                         decades has raised questions about the extent and consequences of 
                         the impacts on the local hydrology. Land cover patterns control 
                         surface runoff, infiltration, evapotranspiration and sediment 
                         production within the watershed, directly influencing the 
                         streamflow dynamics and sediment yield. High deforestation rate at 
                         agricultural frontier areas as well as the recent reduction of 
                         this rate can significantly affect hydrological processes. The 
                         resulting changes on the regional hydrological cycle affect 
                         ecosystem function as well as navigation, agricultural activities, 
                         power generation and riverside inhabitants, either directly or 
                         indirectly. Beyond the scarce availability of hydrologic and 
                         sediment data, the Amazon region also lacks studies that establish 
                         a relationship between land use and the hydrological system. 
                         Applying hydrological models, such as Soil and Water Assessment 
                         Tool (SWAT), in the Amazon region is crucial to the analysis of 
                         the system's response to future land use and climate change 
                         scenarios. The Xingu Watershed (509.000kmē), located at the 
                         agricultural frontier area of Eastern Amazon is divided into areas 
                         of extensive native forests, and areas with differing levels and 
                         types of agricultural activities. This watershed has suffered 
                         intense deforestation over the last four decades, with expansion 
                         of grain cropland and cattle ranching at the southern region of 
                         the basin. As of 2004, government policies increased the 
                         discipline of environmental legislation which has since partially 
                         reduced the advance of deforestation. In this context, this work 
                         aims to model the relation between land use and water discharge of 
                         the Xingu Watershed using the SWAT model, analysing the impacts of 
                         future land use scenarios. To overcome the issue of climate data 
                         scarcity, 1998-2016 Tropical Rainfall Measuring Mission (TRMM) 
                         data series were used along with data provided by the Brazilian 
                         National Meteorological Institute (INMET). Daily streamflow data 
                         were obtained from the Brazilian National Water Agency (ANA). Data 
                         from the TerraClass project (National Institute for Space Research 
                         - INPE/Brazil) were used as land use input, whereas soil physical 
                         characteristics data were prepared using pedotransfer functions 
                         based on studies and Amazonian soil texture data from Radar da 
                         Amazonia Project (RADAMBRASIL) and the Brazilian Soil Survey for 
                         Amazonia (EMBRAPA). Simulations are currently being performed on 
                         two Xingu River sub-basins: Fresco River sub-basin (43.000kmē) and 
                         Iriri River sub-basin (142.000kmē). Initial results from these 
                         simulations suggest a good model fit when simulated flow is 
                         compared to the observed flow from fluviometric stations (r2 = 
                         0.87, NS = 0.85). The continuation of this work aims to expand 
                         modelling to the entire Xingu Watershed, enabling the simulation 
                         of future land use scenarios.",
  conference-location = "Warsaw, Poland",
      conference-year = "26-30 June",
             language = "en",
           targetfile = "santos_land.pdf",
        urlaccessdate = "25 jan. 2021"