Michel Castro Moreira

NetErosividade MG: erosividade da chuva em Minas Gerais

Rainfall erosivity represents the potential of rainfall causing soil erosion. This study aimed to develop a software to estimate rainfall erosivity in the state of Minas Gerais based on Artificial Neural Networks (ANNs). The annual value of the rainfall erosivity is given by the sum of the monthly values of the erosivity indexes EI30 or KE > 25. Two methodologies were used to estimate the kinetic energy for each index. Thus, four erosivity values were evaluated for each month, resulting in the development of 48 ANNs. These ANNs were implemented using the software Borland Delphi 7.0. The new software was called NetErosividade MG. The program calculates the monthly and annual values of rainfall erosivity for any location in the state of Minas Gerais in an easy and fast way.

Programa computacional para geração de séries sintéticas de precipitação

A computational model was developed to generate synthetic series of rainfall using the method developed by OLIVEIRA (2003). The software was developed in Borland Delphi 6.0 environment. The input data come from the daily precipitation data in the standardized format of the National Water Agency (ANA). The software is capable to generate synthetic series of daily rainfall containing the amount and the duration of the rainfall, and the standardized event time of the maximum instantaneous intensity. The generated synthetic series are stored in text-formatted files that may be accessed by others softwares and/or electronic datasheets. There were also presented graphs and tables format, to easily evaluate the performance of the method developed.

Índices de Conflito pelo uso da Água da Bacia do Ribeirão entre Ribeiros

In the Entre Ribeiros river basin, a tributary of Paracatu river, water availability has limited the development of irrigated agriculture, resulting in many water conflicts in the region. Since these water conflicts are not adequately quantified, regional differences cannot be evaluated from the spatial variation of water availability and demand. In order to identify the regions where the water use conflicts occur and to provide information for water resources management and planning, this work analyzed the values of the water resources management index (icg) and the water resources planning index (icp) applied in the Entre Ribeiros river basin. The seven-day minimum flow with a 10-year return period (Q7,10), the long duration medium flow (Qmld), the permitted withdrawals (Qout), the digital elevation model and the river basin hydrography were used to calculate the indexes. The analysis of icg and icp values showed that the water uses in the Entre Ribeiros river basin conflict with the current rules, since the permitted withdrawals are higher than those allowed by legislation. Analyzing the icp, it was shown that the evidenced water use conflicts can be minimized by adopting an appropriate water resources management and planning program. Key-words: water conflict, water permit, water availability.