Now showing items 1-10 of 139
Simulação de perdas de solo em função de cenários de adequação ambiental em microbacias agrícolas
In São Paulo state, deforestation and agriculture activities are increasing soil losses processes, especially in areas of susceptible soils where soil conservation practices are not adopted. Environmental adequacy at ...
Influence of environmental features at multiple scales and spatial structure on stream fish communities in a tropical agricultural region
(Taylor & Francis Inc, 2017-01-01)
Land cover change for agricultural expansion exerts strong pressures on tropical streams. We examined the relative contributions of catchment land cover, local environmental features, and spatial patterns on stream fish ...
Influence of landscape properties on stream water quality in agricultural catchments in Southeastern Brazil
(Edp Sciences S A, 2015-01-01)
Changes in land cover, especially the replacement of forest by agricultural activities affect the hydrological processes of river catchments, resulting in physical and chemical compositional changes of water draining from ...
Assessment of Natural Hazards and Vulnerability in the Rio Copiapó Catchment: A case study in the ungauged Quebrada Cinchado Catchment
(Universidad de Chile, 2012)
Intensive precipitations in desert areas are a very scarce phenomenon. Nevertheless, from time to time these events take place, as in 1997 in Southern Atacama Desert in Chile. The study area within the Copiapó catchment ...
Estimation using 18O of the water residence time in small watersheds
From the 18O hydrograph separation method, it was found that groundwater contribution is the principal component of the total discharge produced by these two catchment areas. The weighted mean of the 18O concentration in ...
Hydrobiogeochemical fluxes and its relation to land use changes at small catchments in the Marapanim River Basin, Pará state, Brazil.
(In: International SWAT Conference, 2014, Porto de Galinhas. Book of Abstracts... Porto de Galinhas: USDA Agricultural Research Service (USDA-ARS), 2014., 2014)
The effects of land use at different spatial scales on instream features in agricultural streams
The conversion of forests into agriculture has been identified as a key process for stream homogenization. However, the effects of this conversion can be scale-dependent. In this context, our aim was to identify the influence ...
Hydrogeological reconnaissance of the river Tortuguero catchment in the Atlantic Zone of Costa Rica
(CATIE, Turrialba (Costa Rica). Atlantic Zone Programme Agricultural University Wageningen, Wageningen (Países Bajos) Ministerio de Agricultura y Ganadería, San José (Costa Rica), 1994)