Abstract A comprehensive assessment of water security can incorporate several water‐related concepts, while accounting for Blue and Green Water (BW GW) types defined in accordance with the hydrological processes involved. Here we demonstrate how a quantitative analysis provision probability use BW GW be conducted, so as to provide indicators scarcity vulnerability at basin level. To illustrate approach, Soil Assessment Tool (SWAT) model hydrology an agricultural (291 km 2 ) within Cantareira...

The Revised Universal Soil Loss Equation (RUSLE)'s cover and management factor (C-factor) is one of the most difficult factors to obtain, mainly because long-term monitoring soil erosion plots under natural rainfall are needed. Therefore, remote sensing approaches have been used as an alternative for obtaining this factor. However, there a lack studies comparing values computed from with measured data. In study, we compare two widely (CrA CVK) estimate C-factor based on Normalized Difference...

Os sistemas de manejo do solo alteram o microrrelevo e a cobertura por resíduos vegetais, influenciando perda água. Assim, os objetivos deste estudo foram avaliar as perdas água estimar taxa infiltração estável no (TIE) em diferentes manejo, sob chuva simulada. As avaliações campo conduzidas sobre após colheita da cultura soja (Glycine max L. Merril). Estudaram-se três solo: semeadura direta, preparo com grade aradora escarificador associados níveis resíduo vegetal: 0,0; 2,0; 4,0 Mg ha-1....

Information about rainfall erosivity is important during soil and water conservation planning. Thus, the spatial variability of state Mato Grosso do Sul was analyzed using ordinary kriging interpolation. For this, three pluviograph stations were used to obtain regression equations between index coefficient EI30. The obtained applied 109 pluviometric stations, resulting in EI30 values. These values from geostatistical technique, which can be divided into: descriptive statistics, adjust...

The Curve Number (CN) method has been widely used to estimate runoff from rainfall events in Brazil; however, CN values for use the Brazilian savanna (Cerrado) are poorly documented. In this study we experimental plots measure natural rain-fall-driven rates of under undisturbed Cerrado and main crops found region, derive associated measured data using five different statistical methods. numbers obtained standard USDA Natural Resources Conservation Service (NRCS) table were suitable bare...

The Brazilian Cerrado has been converted to farmland, and there is little evidence that this expansion will decrease, mainly because agriculture the country's main economic sector. However, impacts of intense modification land use cover on surface runoff soil erosion are still poorly understood in region. Here, we assessed loss a woodland area under former pasture area, which was abandoned undergone natural regeneration process for 7 years (RC). Its results were compared with found an...

The effects of riparian restoration and soil water conservation practices on catchment hydrology are still unclear. Here, we assess whether a positive change in reforestation will affect the availability boost resilience Brazilian Cerrado basin under climate scenarios. This study was developed Três Marias (50.600 km²) located southeastern Brazil. First, calibrated (1992–2005) evaluated (2006–2012) Soil Water Assessment Tool (SWAT) model. Then, created land cover use (LCLUC) scenario that...

The Pantanal biome integrates the lowlands of Upper Paraguay Basin (UPB), which is hydrologically connected to biomes Cerrado and Amazon (the highlands UPB). effects recent land-cover land-use (LCLU) changes in highlands, combined with climate change, are still poorly understood this region. Here, we investigate soil erosion Brazilian under LCLU by combining different scenarios projected rainfall erosivity management. We compute average annual for baseline (2012) 2020, 2035, 2050. For worst...

Abstract. Climate change affects the global water cycle and has potential to alter availability for food–energy–water production, ecosystems services, on regional local scales. An understanding of these effects is crucial assessing future availability, development sustainable management plans. Here, we investigate influence anticipated climate security in Jaguari Basin, which main source freshwater 9 million people São Paulo metropolitan region (SPMR). First, calibrate evaluate a...

Water scarcity is a key challenge to global development. In Brazil, the Sao Francisco River Basin (SFB) has experienced water problems because of decreasing streamflow and increasing demands from multiple sectors. However, drivers decreased streamflow, particularly potential role surface-groundwater interaction, have not yet been investigated. Here, we assess long-term trends in baseflow SFB during 1980–2015 constrain most likely observed decreases through trend analysis precipitation (P),...

Based on “user pays” and “provider gets” principles, the Payment for Environmental Services (PES) consists of providing economic incentives or compensation land users who adopt activities that promote ecosystem services. These PES initiatives have grown rapidly in Brazil over last few decades, however, studies address panorama these programs country are still scarce, regional, outdated. Here, we investigate overview through interviews an extensive literature review. We found total 80...

Visa-se, neste trabalho, avaliar os dados Shuttle Radar Topography Mission (SRTM) na caracterização morfométrica de bacias hidrográficas, através da comparação das características obtidas a partir SRTM e cartas topográficas, processados em Sistema Informação Geográfica (SIG). O estudo foi realizado tomando-se por base bacia hidrográfica do Ribeirão Salobra, com área aproximada 540 km². A diferença percentual obtida nos morfométricos entre métodos estudados inferior 11%, exceto no índice...

ABSTRACT The Curve Number (CN) method is extensively used for predict surface runoff from storm events. However, remain some uncertainties in the method, such as use of an initial abstraction (λ) standard value 0.2 and on choice most suitable CN values. Here, we compute λ values using rainfall data to a rural basin located Midwestern Brazil. We 30 observed rainfall-runoff events with depth greater than 25 mm derive associated five statistical methods. noted ranging 0.005 0.455, median 0.045,...

The use of the Universal Soil Loss Equation (USLE) and Sediment Delivery Ratio (SDR) facilitates sediment yield (SY) estimates in watersheds. However, soil loss predictions are frequently unrealistic because methods used to estimate USLE’s factors. Here, we evaluated performance erodibility (K-factor) influence its estimation SY predictions. K-factor values were obtained from three widely equations using a portable rainfall simulator. These compute annual average tropical watershed. We...

A delimitação adequada de bacias hidrográficas é fundamental por ser essa a unidade territorial para fins planejamento e gerenciamento dos recursos hídricos. Desse modo, este trabalho teve objetivo analisar uma metodologia automática hidrográficas. Foram utilizados, tanto, dados do projeto Shuttle Radar Topographic Mission (SRTM) integrados processados em Sistema Informações Geográficas (SIG). Os resultados confirmam valores área compatíveis aos obtidos com base cartas topográficas. Assim,...

Hydrological modeling has been used worldwide as an important tool to evaluate the consequences of land cover and use change on hydrological processes. However, lack spatial-temporal rainfall runoff data have compromised reliability results in several regions Brazil. In this study, authors investigated uncertainty analysis Bayesian model averaging (BMA) a for improving streamflow estimates Ribeirão da Onça Basin (ROB), located southeastern They set two precipitation sources (ground remote...

The Strategic Environmental Assessment (SEA) of the sugar and alcohol sector guides a territorial sectoral planning that benefits most local society supports this economic activity in all its stages. In way, present work aims to determine an index aggregation indicators generated baseline SEA process, called Index Sustainability Expansion Sugar Alcohol Sector (IScana). For this, it was used normalization each city by fuzzy logic attribution weights Analytic Hierarchy Process (AHP). Then,...

The United States and Brazil both deal with water-related problems associated being large territorial areas having uneven distribution of water resources population. Water transfer projects have been widely considered to be feasible solutions the mitigation local shortages. This paper contrasts American Brazilian allocation systems projects, located in Colorado Piracicaba River basins, seeking potential exchanges between these two management analyzing their adaptability trends demand...

The topographic factor of the Universal Soil Loss Equation and its revised version (R)USLE are currently calculated by Digital Elevation Models (DEM) integrated to Geographic Information Systems (GIS). However, some countries have no information calculate DEM. In this study we evaluated use Shuttle Radar Topography Mission (SRTM) data for computing factor. Furthermore, 90 m SRTM DEM, refined 30 DEM DEMs derived from official maps (1:100,000 scale) were used. Using was USLE-2D software....

Water infiltration in the soil is an important hydrological process that occurs at interface of soil-atmosphere system; thus, management practice used has a strong influence on this process. The aim study was to evaluate water and compare equations for estimating rate Ultisol after harvesting common bean (Phaseolus vulgaris L.) under simulated rainfall. Field tests with rainfall simulator were carried out three systems: minimum tillage (MT), conventional (CT), no (NT). In NT, four levels...

In flood area mapping studies, hydrological-hydraulic modeling has been successfully applied around the world. However, object of study most research developed in Brazil is medium to large channels that use topographical and hydrometeorological data coarse spatial temporal resolution. Thus, aim this investigate coupled a small urban channel, using high-resolution data, simulation events located Campo Grande, Mato Grosso do Sul. study, we used HEC-HMS HEC-RAS programs, where topographic...

A estimativa da evapotranspiração por métodos indiretos propicia, de modo facilitado, a geração dados para o planejamento sistemas irrigação e aplicação modelos meteorológicos hidrológicos, ambos, úteis na gestão bacias hidrográficas. O objetivo deste trabalho foi elaborar uma Rede Neural Artificial (RNA) estimar referência (Eto) em função diários temperatura do ar. RNA, tipo FeedForward Multilayer Perceptron, treinada tomando-se Eto diária obtida pelo método Penman-Monteith. Nas camadas...