A aplicação de modelos matemáticos na análise da perda de solo em bacias hidrográficas ganhou atenção, nos anos de 1960 e 1970, a partir da análise integrada da paisagem. Nesse contexto, a Equação Universal de Perda de Solo (EUPS) se destaca como um dos modelos mais utilizados mundialmente no conhecimento dos processos erosivos e no planejamento ambiental. Diante disso, este estudo tem por objetivo estimar as perdas de solos nas bacias hidrográficas dos córregos Macacão e Mutum, localizadas no município de Palmas (TO). Os resultados demonstram que as áreas estudadas sofreram com um alto poder de erosividade (R) ao longo dos anos 1995 a 2019, com valores entre 12,188 a 12,319 t/ha MJ-1 mm-1. Quanto ao solo, o Neossolo Litólico Distrófico (RLD) apresenta o maior valor de erodibilidade (K), 0,049 t/ha MJ-1 mm-1.No que tange ao fator topográfico (LS), cerca de 80% das áreas das bacias mostram valores de LS considerados baixos, situados entre 0,029 a 1,86, e 1,86 a 4,30. Já para o fator relacionado ao uso e manejo do solo e às práticas conservacionistas (CP), as áreas mais suscetíveis ao processo erosional diz respeito às classes de pastagem e queimadas. Desta forma, observa-se que as classes de erosão hídrica nas bacias são consideradas moderada, grave e muito grave pelo estudo da Food and Agriculture Organization (FAO) de 1984, ainda que represente somente 19% da área da bacia do Macacão e 24% da bacia do Córrego Mutum. Loss of soil in the high course of hydrographic basins of ribeirões Taquaruçu Grande and Taquaruçuzinho, Palmas (TO) A B S T R A C TThe application of mathematical models in the analysis of soil loss in watersheds gained attention in the 1960s and 1970s from the integrated analysis of the landscape. In this context, the Universal Soil Loss Equation (EUPS) stood out as one of the most used models worldwide in the knowledge of erosion processes and in environmental planning. Therefore, this study aims to estimate soil losses in the hydrographic basins of the Macacão and Mutum streams, located in the municipality of Palmas (TO). The results demonstrate that the studied areas suffered from a high power of erosivity (R) over the years 1995 to 2019, with values between 12.188 to 12.319 t/ha MJ-1 mm-1. As for the soil, the Neosol Litolic Dystrophic (RLD) has the highest erodibility value (K), 0.049 t/ha MJ-1 mm-1. Regarding the topographic factor (LS), about 80% of the basin areas show LS values considered low, situated between 0.029 to 1.86, and 1.86 to 4.30. As for the factor related to the use and management of soil and conservation practices (CP), the areas most susceptible to the erosion process concern the grazing and burning classes. Thus, it is observed that the classes of water erosion in the basins are considered moderate, severe and very severe by the Food and Agriculture Organization (FAO) study of 1984, although it represents only 19% of the area of the Macacão basin and 24% of the Mutum Stream basin.Keywords: Water erosion. Hydrographic basin. USLE.
Introduction.Hospital El Cruce is a tertiary care facility which is part of a healthcare network that has been operating since July 2008 and includes health centers from five municipalities of the South of Greater Buenos Aires. The objective of the study was to describe the referral and counter-referral system at the pediatric intermediate medical care unit of the Hospital El Cruce, the tertiary level care of the network, and secondly to identify the critical points that could go against the consolidation of the network and to analyze the level of knowledge about it. Population and Methods. This was a crosssectional, prospective study conducted at the pediatric intermediate medical care unit of Hospital El Cruce between July 2008 and December 2010. Indicators related to patient admission and discharge were analyzed. A survey was administered to all the heads of the network's pediatric departments in order to assess the level of knowledge they had about it. Results. A total of 1677 patients were hospitalized; 83.9% were referred from the network. Of all referrals made, 71.1% were accepted. There were 156 patients (9.4%) who were counter-referred to the referring facility. The survey results showed that 70% of heads of pediatric departments were unaware of the range of services provided by the network. Conclusions. Health care exchange was predominantly based on accepting patients referred from secondary care facilities to Hospital El Cruce and a minimum number of counterreferrals to referring facilities, with a radial pattern dynamics. There was scarce knowledge about the availability of the network health service delivery.
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