Integrated modelling of climate, water, soil, agricultural and socio-economic processes: A general introduction of the methodology and some exemplary results from the semi-arid north-east of Brazil

Krol, Martinus S.; Jaeger, Annekathrin; Bronstert, Axel; Güntner, Andreas

doi:10.1016/j.jhydrol.2005.12.021

Cited by 68 publications

(44 citation statements)

References 20 publications

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“…O rio principal da BHRI (rio Ipanema) nasce no estado de Pernambuco, no município de Pesqueira-PE, a uma altitude aproximada de 1.000 m e atravessa o estado de Alagoas antes de desaguar na margem esquerda do rio São Francisco. A área da BHRI se insere em uma região do Nordeste do Brasil denominada Polígono das Secas, caracterizada por apresentar longos períodos de estiagem e intensa disputa pelo uso da água (Krol et al, 2006). O clima da região é caracterizado como semiárido muito quente com temperaturas médias anuais superiores a 23ºC, de acordo com a classificação estabelecida por Köppen.…”

Section: áRea De Estudounclassified

Estimativa do balanço hídrico de uma sub-bacia da Bacia Hidrográfica do Rio Ipanema com o Modelo SWAT

Sousa¹,

Viana²,

Silva³

et al. 2018

J. Env. Anal. Progr.

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A B S T R A C TThe use of hydrological models aimed to obtain a realistic prediction of the hydrological processes that occur on hydrographic basins, especially the transformation of precipitation into surface runoff and evapotranspiration. Currently, a large number of hydrological predict models are used, highlights to Soil and Water Assessment Tool (SWAT), developed by the US Agricultural Research Service / United States Department of Agriculture (ARS / USDA). The study aimed to compare and analyze the water balance of a subbasin of the Ipanema River basin-PE by means of the estimation presented by the SWAT model and the method of Thornthwaite & Mather. Thus, this research aimed to map the sub-basin of the Ipanema river, located on Agreste mesoregion of Pernambuco State. The counties selected were to map were Venturosa, Alagoinha, Pedra, and Buíque. The monthly mean values of water balance components simulated by the SWAT were compared to monthly averages simulated by the Thornthwaite & Mather method. The monthly values were compared using the means of dispersion plots and the coefficient of determination, which was included the total amount of rain that precipitates over the area of the sub basin during the simulation time and the evapotranspiration measured in-situ and potential evapotranspiration. The two methods and the three variables studied showed a good representation of temporal cycle, and estimations of monthly: precipitation, real evapotranspiration, and potential evapotranspiration.

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Section: áRea De Estudounclassified

Estimativa do balanço hídrico de uma sub-bacia da Bacia Hidrográfica do Rio Ipanema com o Modelo SWAT

Sousa¹,

Viana²,

Silva³

et al. 2018

J. Env. Anal. Progr.

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“…Models combined with hydrological observations from catchments in the area indicate the possibility of substantial reduction in surface water availability (Montenegro and Ragab 2012) and an ongoing process of environmental dryness (Rodrigues da Silva 2004). Indeed, integrated modeling studies show that water management is a key question for the development and sustainability of the semi-arid region of Brazil (e.g., Krol et al 2006).…”

Section: Importance Of Climate Change For Smallholder Farmersmentioning

confidence: 99%

Climate change adaptation strategies for smallholder farmers in the Brazilian Sertão

Burney

Cesano²,

Russell

et al. 2014

Climatic Change

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Climate models agree that semi-arid regions around the world are likely to experience increased rainfall variability and longer droughts in the coming decades. In regions dependent on agriculture, such changes threaten to aggravate existing food insecurity and economic underdevelopment, and to push migration to urban areas. In the Brazilian semi-arid region, the Sertão, farmers' vulnerability to climate-past, present, and future-stems from several factors, including low yielding production practices and reliance on scarce and seasonally variable water resources. Using interpolated local climate data, we show that, since 1962, in the Bacia do Jacuípe-one of the poorest regions in the Sertão of Bahía state-average temperatures have increased~2°C and rainfall has decreased~350 mm. Over the same time period, average milk productivity-the main rural economic activity in the county-has fallen while in Brazil and in Bahía as a whole milk productivity has increased dramatically. This paper teases apart the drivers of climate vulnerability of the Bacia do Jacuípe in relation to the rest of Bahía. We then present the results of a suite of pilot projects by Adapta Sertão, a coalition of organizations working to improve the adaptive capacity of farmers living in the semi-arid region. By testing a number of different technologies and arrangements at the farm level, Adapta Sertão has shown that interventions focused on balanced animal diets and efficient irrigation systems can help reduce (but not eliminate) the dependence of production systems

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“…WASA-SED is a semi-distributed, deterministic model for continuous simulation of water and sediment fluxes. It is composed of process-oriented conceptual approaches, and has been included in an integrated modelling framework (Krol et al, 2006). The main features of WASA-SED relate to: the model's applicability to large areas (for instance, Güntner, 2002, simulated the entire Brazilian states of Ceará and Piauí, an area of 398 000 km 2 ); and the Simulation of specific semi-arid characteristics, such as Hortonian type flow, runoff re-infiltration at downstream positions and a dense network of surface reservoirs, for which a cascade method is used.…”

Section: Modelling Approachmentioning

confidence: 99%

Modelling spatio-temporal patterns of sediment yield and connectivity in a semi-arid catchment with the WASA-SED model

Medeiros

Güntner

Francke

et al. 2010

Hydrological Sciences Journal

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Rainfall-runoff induced soil erosion causes important environmental degradation by reducing soil fertility and impacting on water availability as a consequence of sediment deposition in surface reservoirs used for water supply, particularly in semi-arid areas. However, erosion models developed on experimental plots cannot be directly applied to estimate sediment yield at the catchment scale, since sediment redistribution is also controlled by the transport conditions along the landscape. In particular, representation of landscape connectivity relating to sediment transfer from upslope areas to the river network is required. In this study, the WASA-SED model is used to assess the spatial and temporal patterns of water and sediment connectivity for a semi-arid meso-scale catchment (933 km 2 ) in Brazil. It is shown how spatial and temporal patterns of sediment connectivity within the catchment change as a function of landscape and event characteristics. This explains the nonlinear catchment response in terms of sediment yield at the outlet.Key words sediment yield; watershed connectivity; catchment scale; semi-arid; WASA-SED model Modélisation des patrons spatio-temporels de la connectivité et de la production de sédiments dans un bassin versant semi-aride à l'aide du modèle WASA-SED Résumé L'érosion des sols induite par le ruissellement cause d'importantes dégradations de l'environnement en réduisant la fertilité des sols et en ayant un impact sur la disponibilité de l'eau suite au dépôt de sédiments dans les réservoirs, particulièrement dans les régions semi-arides. Cependant, des modèles d'érosion développés pour des parcelles expérimentales ne peuvent pas être appliqués à l'évaluation de la production de sédiments à l'échelle des bassins hydrographiques, parce que la redistribution des sédiments est aussi contrôlée par les conditions de transport dans le paysage. En particulier il est nécessaire de représenter la connectivité du paysage en relation avec le transfert des sédiments des versants vers le réseau hydrographique. Dans cette étude, on utilise le modèle WASA-SED pour évaluer les patrons spatio-temporels de la connectivité de l'eau et des sédiments dans un bassin versant semi-aride de méso-échelle (933 km 2 ) au Brésil. Les résultats montrent comment les patrons spatio-temporels de la connectivité des sédiments dans le bassin versant changent en fonction des caractéristiques du paysage et des événements. Ceci explique la réponse non-linéaire du bassin versant en termes de production de sédiments à l'exutoire.Mots clefs production des sédiments; connectivité; échelle du basin versant; semi-aride; modèle WASA-SED

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Integrated modelling of climate, water, soil, agricultural and socio-economic processes: A general introduction of the methodology and some exemplary results from the semi-arid north-east of Brazil

Cited by 68 publications

References 20 publications

Estimativa do balanço hídrico de uma sub-bacia da Bacia Hidrográfica do Rio Ipanema com o Modelo SWAT

Estimativa do balanço hídrico de uma sub-bacia da Bacia Hidrográfica do Rio Ipanema com o Modelo SWAT

Climate change adaptation strategies for smallholder farmers in the Brazilian Sertão

Modelling spatio-temporal patterns of sediment yield and connectivity in a semi-arid catchment with the WASA-SED model

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