Navegando por Autor "COSTA, Jamer Andrade da"

Agora exibindo 1 - 2 de 2

Acesso aberto (Open Access)
Desenvolvimento de um sistema de alerta de enchente aplicado aos planos de defesa civil em áreas de risco no estado do Pará utilizando Sistema de Informações Geográficas (SIG), caso: cidade de Marabá
(Universidade Federal do Pará, 2012-03-02) COSTA, Jamer Andrade da; COSTA, Tony Carlos Dias da; http://lattes.cnpq.br/5776447682706171
This dissertation develops a Flood Warning System for the city of Marabá, located at the confluence of Tocantins and Itacaiúnas Rivers, 400 quilometers south from Belém, capital of the State of Pará (Brazil). The Flood Warning System is based on the hydrological model MOD-4B incorporated into a Geographic Information System. This system forecasts changes in the level of the Tocantins River throughout the year. It monitors the initiation of the flood 4 days in advance, resulting in more efficient Civil Defense actions. As reference, the forecasting model used the limnimeter poles located on the Tocantins and Araguaia Rivers, in the towns of Carolina and Conceição do Araguaia, respectively about 225 and 270 quilometers south from the city of Marabá. The system uses the GIS software ArcView 3.3, which was implemented through an interface developed through an object-oriented programming language called Avenue to run the application of the hydrological model. The use of windows and menus adapted to the model grants access to spatial data and relational database tables and / or record database. It also provides modules for spatial analysis and visualization of geographic data in a Geographic Information System (GIS), which forecasts flooding in the form of maps, charts and reports, showing the flooded areas for periods of 4, 3, 2 and 1 day before the occurrence of flooding. The system also identifies the affected streets and buildings, quantifying the affected population and the damages caused. With this, the Civil Defense can execute efficient action plans before, during and after the flooding.
Acesso aberto (Open Access)
Erosividade da chuva em Rondon do Pará, PA, Brasil de 1999 a 2015 e projetada para 2035
(Universidade Federal do Pará, 2016-12) ROSA, Amanda Gama; SOUSA, Adriano Marlisom Leão de; COSTA, Jamer Andrade da; SOUZA, Everaldo Barreiros de
This study determined the rainfall erosivity value for the urban area of Rondon do Pará in order to provide information about the city's soil loss. The study also determined the probability of erosion occurrence and the return period projected for the next 20 years. The annual distribution of the erosivity index was analyzed and an estimate was made of the correlation between the average monthly erosivity index and the rainfall coefficient. To accomplish this, two types of rainfall data were obtained: 1) data observed by the CMORPH satellites from 1999 to 2015; and 2) data modelled by the RegCM4 model from 2016 to 2035. Erosivity was calculated based upon these monthly and annual rainfall data. Frequency distributions of erosivity values and their return periods were calculated and probability curves were plotted. Regression analyses between precipitation and erosivity were completed. In the period from 1999 to 2015, the value of the R factor of Rondon do Pará was 16,390 MJ mm ha-1h-1ano-1, with a probability of 47% of being equaled or exceeded at least once each 2.1 years. In the period from 2016 to 2015, the R value was 13,038 MJ mm ha-1h-1year-1. Highest soil losses are probable between February and January from 1999 to 2015 and between January and April from 2016 to 2035. The regression mathematical models that had the best results were the potency and the polynomial models for the years from 1999 to 2015 and 2016 to 2035, respectively.