RBRH-Revista Brasileira de Recursos Hidricos最新文献_第8页

Soil water infiltration under different land use conditions: in situ tests and modeling 不同土地利用条件下的土壤水分入渗:原位试验与模拟

IF 0.8

RBRH-Revista Brasileira de Recursos Hidricos Pub Date : 2021-08-27 DOI: 10.1590/2318-0331.262120210063

M. Failache, Lázaro Valentin Zuquette

{"title":"Soil water infiltration under different land use conditions: in situ tests and modeling","authors":"M. Failache, Lázaro Valentin Zuquette","doi":"10.1590/2318-0331.262120210063","DOIUrl":"https://doi.org/10.1590/2318-0331.262120210063","url":null,"abstract":"ABSTRACT The efficiency and suitability of different models to estimate infiltration rates in Ferralic Arenosols and Rhodic Ferralsols in southern Brazil are evaluated in this paper. The influence of nine types of land use and soil management practices on infiltration modeling is also assessed. Model parameterization was performed fitting 42 experimental infiltration curves obtained by in situ tests with a double-ring infiltrometer. Soil characterization was also performed in laboratory. The results were assessed using basic statistical descriptors and model accuracy indicators (Nash and Sutcliffe efficiency coefficient and root mean square error). The investigated models satisfactorily simulated the infiltration rates and the most accurate model was modified Kostiakov, followed by the Horton; Singh and Yu; modified Holtan; Holtan; Philip; Green and Ampt/Mein and Larson and Kostiakov. Different types of land uses and soil management practices significantly affect the infiltration rates, mainly those combination with great presence of macroporosity that resulted in an erratic infiltration behavior and affected the infiltration model accuracy.","PeriodicalId":54151,"journal":{"name":"RBRH-Revista Brasileira de Recursos Hidricos","volume":"201 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80165507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Variability and spatial distribution of hydrodynamic properties in soil with preserved Caatinga 卡廷加保存土壤水动力特性的变异及空间分布

IF 0.8

RBRH-Revista Brasileira de Recursos Hidricos Pub Date : 2021-08-09 DOI: 10.1590/2318-0331.262120210058

José Martins de França Neto, A. P. Coutinho, S. D. Prima, Saulo de Tarso Marques Bezerra, Severino Martins dos Santos Neto, Ana Emília Carvalho de Gusmão da Cunha Rabelo, A. Oliveira, A. Antonino

{"title":"Variability and spatial distribution of hydrodynamic properties in soil with preserved Caatinga","authors":"José Martins de França Neto, A. P. Coutinho, S. D. Prima, Saulo de Tarso Marques Bezerra, Severino Martins dos Santos Neto, Ana Emília Carvalho de Gusmão da Cunha Rabelo, A. Oliveira, A. Antonino","doi":"10.1590/2318-0331.262120210058","DOIUrl":"https://doi.org/10.1590/2318-0331.262120210058","url":null,"abstract":"ABSTRACT The functions of soil water retention and hydraulic conductivity are indispensable for the characterization and modeling of the infiltration and water transfer processes in the vadose zone. In the case of the Brazilian semi-arid region, characterized by the scarcity of water resources, there is a lack of information on the hydrodynamic properties of the soil. Also, these properties have numerous factors of variability, requiring the characterization of their magnitude and distribution in space. This research presents an analysis of the infiltration process and the hydrodynamic properties of the soil under native Caatinga forest, observing its spatial distribution. This vegetation is typical of the Brazilian semi-arid region. One developed a 48-point grid in an area of approximately 875 m2, and applied on it the Beerkan methodology. The analyzes were performed based on the application of the BEST-Slope algorithm and statistical measures of the position, dispersion, and adherence tests. The results showed medium to high variability indices for the hydrodynamic properties, with random spatial distribution, despite the verification of a homogeneous texture in the area. Thus, it was found that the soil structure was predominant in the processes of water infiltration.","PeriodicalId":54151,"journal":{"name":"RBRH-Revista Brasileira de Recursos Hidricos","volume":"1 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88806139","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Using artificial neural networks to determine sediment concentration at limit of deposition in storm sewers 利用人工神经网络确定雨水渠淤积极限泥沙浓度

IF 0.8

RBRH-Revista Brasileira de Recursos Hidricos Pub Date : 2021-08-09 DOI: 10.1590/2318-0331.262120210030

Adhemar Romero, J. Ota

{"title":"Using artificial neural networks to determine sediment concentration at limit of deposition in storm sewers","authors":"Adhemar Romero, J. Ota","doi":"10.1590/2318-0331.262120210030","DOIUrl":"https://doi.org/10.1590/2318-0331.262120210030","url":null,"abstract":"ABSTRACT The concept of sediment transport at the limit of deposition in storm sewers represents one operational condition that avoid deposition of sediments maintaining the discharge capacity of the pipes. In this study, this condition was analyzed applying one Artificial Neural Network Multilayer Perceptron (ANN-MLP) model to predict the volumetric concentration at the limit of deposition, using 544 experimental data from literature. It was evaluated different input variables combinations and model configurations, showing the sensitivity of the model with these changes. Through this study, it was demonstrated that the proposed model outperforms the existing equations, leading to more assertive predictions in the determination of volumetric concentrations at the limit of deposition, resulting in values of R2 = 0.92, Mean Absolute Percentage Error (MAPE) = 35.09 % and Mean Average Error (MAE) = 59.84 ppm. With the performed analysis, the study selects one equation to be used for extrapolations when determining the volumetric concentration at the limit of deposition in storm sewers. The selected equation is superior due to its theoretical basis. This work includes one more concept to a better methodology in obtaining the conditions of the flow at the limit of deposition.","PeriodicalId":54151,"journal":{"name":"RBRH-Revista Brasileira de Recursos Hidricos","volume":"56 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77444614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A new empirical viscosity model for composed suspensions used in experiments of sediment gravity flows 泥沙重力流试验中复合悬浮液的新经验黏度模型

IF 0.8

RBRH-Revista Brasileira de Recursos Hidricos Pub Date : 2021-08-09 DOI: 10.1590/2318-0331.262120210048

Camila Castro, Ana Luiza de Oliveira Borges, Rafael Manica

{"title":"A new empirical viscosity model for composed suspensions used in experiments of sediment gravity flows","authors":"Camila Castro, Ana Luiza de Oliveira Borges, Rafael Manica","doi":"10.1590/2318-0331.262120210048","DOIUrl":"https://doi.org/10.1590/2318-0331.262120210048","url":null,"abstract":"ABSTRACT Sediment gravity flows are natural flows composed by water and sediment in which the gravitational flow acts on the sediment. The distinct physical properties of the cohesive (clay) and non-cohesive (sand) sediment, and the interaction between these particles alter the ability of the flow to resist to the movement (rheology) along time and space, represented by the viscosity of a mixture suspension. Hence, we propose to study the rheological properties of those mixtures and calculate their relative viscosity when used in the physical simulation of turbidity currents. Rheological tests were performed with various mixtures composed by water, clay and/or coal. Two equations are proposed to estimate the relative viscosity as a function of volume concentration of each sediment, the maximum packing fraction and the percentage of clay present in the mixture. The results also show an error close to 20% comparing similar models from the literature, which are satisfactory. The results also demonstrate that caution should be exercised when generalizing the use of a single model to predict the relative viscosity of suspensions. The influence of density (ρ), grain shape, clay percentage (Cclay), volumetric concentration (ϕ) and maximum packaging fraction (ϕmax) should be considered in the formulation of the equations.","PeriodicalId":54151,"journal":{"name":"RBRH-Revista Brasileira de Recursos Hidricos","volume":"400 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88477884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Quality analysis of water level series obtained by altimetric radar satellite along the São Francisco River <s:1>奥弗朗西斯科河沿岸测高雷达卫星获取的水位序列质量分析

IF 0.8

RBRH-Revista Brasileira de Recursos Hidricos Pub Date : 2021-08-09 DOI: 10.1590/2318-0331.262120210069

Luana Kessia Lucas Alves Martins, P. Maillard, E. Pinto, D. Moreira

{"title":"Quality analysis of water level series obtained by altimetric radar satellite along the São Francisco River","authors":"Luana Kessia Lucas Alves Martins, P. Maillard, E. Pinto, D. Moreira","doi":"10.1590/2318-0331.262120210069","DOIUrl":"https://doi.org/10.1590/2318-0331.262120210069","url":null,"abstract":"ABSTRACT Radar altimeters are instruments carried on space missions and allow for determination of heights, particularly in oceans and ice sheets. The use of altimetry data on continental waters involves several challenges, such as the revisit frequency (typically 27 to 35 days), an accuracy of decimeters, data handling and processing, particularly for narrow rivers such as the São Francisco River (width<1km). Radar satellite altimetry has advantages over the conventional in situ monitoring network, including in terms of spatial coverage and global altimetric reference of data. Thus, altimetry data should be used as a complementary and/or alternative source to in situ data. In this context, this study consolidates and evaluates the altimetric series of five different altimetry missions: Envisat in two orbits, Saral, Sentinel 3-A, and Sentinel 3-B. The altimetry water level time series of 17 Virtual stations were compared with leveled gauging stations series to calculate absolute and relative errors. Ultimately, the errors varied from 0.13 m to 0.36 m in the best cases (41%), in line with recent literature. Sentinel-3 satellites showed the best RMSE absolute/relative results: 0.95/0.49 m (S-3A) and 0.96/0.52 m (S-3B). The second best RMSEs was Envisat-X (1.39/0.50 m), then Envisat (1.87/0.56 m) and Saral (1.74/0.60 m).","PeriodicalId":54151,"journal":{"name":"RBRH-Revista Brasileira de Recursos Hidricos","volume":"40 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73538496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pluviometric patterns in the São Francisco River basin in Minas Gerais, Brazil 巴西米纳斯吉拉斯州<s:1>奥弗朗西斯科河流域的降水模式

IF 0.8

RBRH-Revista Brasileira de Recursos Hidricos Pub Date : 2021-07-30 DOI: 10.1590/2318-0331.262120210035

Dawber Batista Ferreira, G. Barroso, M. Dantas, Karla Lorrane de Oliveira, Cristiano Christofaro, S. C. Oliveira

引用次数: 2

Change in the dynamics of salinity and water quality of an island estuary by the discharge of effluents 污水排放引起的岛屿河口盐度和水质的动态变化

IF 0.8

RBRH-Revista Brasileira de Recursos Hidricos Pub Date : 2021-07-30 DOI: 10.1590/2318-0331.2621202100263

C. J. Rodrigues, D. Franco, A. Fonseca, N. K. Leite, L. Garbossa, Aichely Rodrigues da Silva

{"title":"Change in the dynamics of salinity and water quality of an island estuary by the discharge of effluents","authors":"C. J. Rodrigues, D. Franco, A. Fonseca, N. K. Leite, L. Garbossa, Aichely Rodrigues da Silva","doi":"10.1590/2318-0331.2621202100263","DOIUrl":"https://doi.org/10.1590/2318-0331.2621202100263","url":null,"abstract":"ABSTRACT Anthropic changes in coastal watersheds affect the quantity and quality of water in estuaries. Based on an analytical model of saline intrusion and load balance, we have evaluated the effects of effluent discharge (mean of 285 L·s−1 and peak of 495 L·s−1) from a wastewater treatment plant (WWTP) in an island estuary. Saline intrusion at low tide, without actual anthropic discharge, will increase by 22%, whereas with increasing discharge, reductions of 16% and 28%. The reduction of saline intrusion may affect biogeochemical processes and the distribution of species in regions further up the estuary. When the WWTP reaches the mean projected discharge, it will increase its BOD and phosphorus loads by 90% and 82%, respectively, in relation to the current load. With the increase of WWTP discharge, there will be an expansion of hypoxic and anoxic conditions over the current areas, worsening the condition of this already jeopardized estuary. For the WWTP to lead to the expected environmental gains, it is necessary to consider the carrying capacity of the receiving body.","PeriodicalId":54151,"journal":{"name":"RBRH-Revista Brasileira de Recursos Hidricos","volume":"15 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89853431","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Development of reservoir operation rules using seasonal climate forecasts 利用季节气候预报制定水库运行规则

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RBRH-Revista Brasileira de Recursos Hidricos Pub Date : 2021-07-30 DOI: 10.1590/2318-0331.262120210012

A. Morais, A. G. Maia

引用次数: 2

Satellite altimetry over small reservoirs in the Brazilian semiarid region 巴西半干旱地区小水库的卫星测高

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RBRH-Revista Brasileira de Recursos Hidricos Pub Date : 2021-07-30 DOI: 10.1590/2318-0331.262120210038

Alfredo Ribeiro Neto, Sajedeh Behnia, M. Tourian, F. A. D. Costa, N. Sneeuw

引用次数: 0

Hydrogeochemical characterization of reservoir waters undergoing salinization processes in Northeastern Brazil 巴西东北部经历盐渍化过程的水库水的水文地球化学特征

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RBRH-Revista Brasileira de Recursos Hidricos Pub Date : 2021-07-30 DOI: 10.1590/2318-0331.262120210043

J. Alves, Maria Hortência Rodrigues Lima, Josefa Raimunda Dória, Igor Santos Silva, A. Monteiro

引用次数: 4