@Article{ZeriACCCSUVJ:2018:ToCoAg,
               author = "Zeri, Marcelo and Alval{\'a}, Regina C{\'e}lia S. and Carneiro, 
                         Rog{\'e}rio and Cunha Zeri, Gisleine da Silva and Costa, 
                         Jos{\'e} Maria and Spatafora, Luciana Rossato and Urbano, 
                         Domingos and Vall-Llossera, Merc{\`e} and Jos{\'e}, Marengo",
          affiliation = "{Centro Nacional de Monitoramento e Alertas de Desastres Naturais 
                         (CEMADEN)} and {Centro Nacional de Monitoramento e Alertas de 
                         Desastres Naturais (CEMADEN)} and {Centro Nacional de 
                         Monitoramento e Alertas de Desastres Naturais (CEMADEN)} and 
                         {Instituto Nacional de Pesquisas Espaciais (INPE)} and {Centro 
                         Nacional de Monitoramento e Alertas de Desastres Naturais 
                         (CEMADEN)} and {Universitat Polit{\`e}cnica de Catalunya} and 
                         {Centro Nacional de Monitoramento e Alertas de Desastres Naturais 
                         (CEMADEN)} and {Universitat Polit{\`e}cnica de Catalunya} and 
                         {Centro Nacional de Monitoramento e Alertas de Desastres Naturais 
                         (CEMADEN)}",
                title = "Tools for communicating agricultural drought over the Brazilian 
                         Semiarid using the soil moisture index",
              journal = "Water (Switzerland)",
                 year = "2018",
               volume = "10",
               number = "10",
                pages = "e1421",
                month = "Oct.",
             keywords = "soil moisture, soil moisture index, drought, semiarid, relative 
                         extractable water, available water fraction.",
             abstract = "Soil moisture over the Brazilian semiarid region is presented in 
                         different visualizations that highlight spatial, temporal and 
                         short-term agricultural risk. The analysis used the Soil Moisture 
                         Index (SMI), which is based on a normalization of soil moisture by 
                         field capacity and wilting point. The index was used to 
                         characterize the actual soil moisture conditions into categories 
                         from severe drought to very wet. In addition, the temporal 
                         evolution of SMI was implemented to visualize recent trends in 
                         short-term drought and response to rainfall events at daily time 
                         steps, as new data are available. Finally, a visualization of 
                         drought risk was developed by considering a critical value of SMI 
                         (assumed as 0.4), below which water stress is expected to be 
                         triggered in plants. A novel index based on continuous exposure to 
                         critical SMI was developed to help bring awareness of real time 
                         risk of water stress over the region: the Index of Stress in 
                         Agriculture (ISA). The index was tested during a drought over the 
                         region and successfully identified locations under water stress 
                         for periods of three days or more. The monitoring tools presented 
                         here help to describe the real time conditions of drought over the 
                         region using daily observations. The information from those tools 
                         support decisions on agricultural management such as planting 
                         dates, triggering of irrigation, or harvesting.",
                  doi = "10.3390/w10101421",
                  url = "http://dx.doi.org/10.3390/w10101421",
                 issn = "2073-4441",
             language = "en",
           targetfile = "zeri_tools.pdf",
        urlaccessdate = "24 abr. 2024"
}