River Basin Management X最新文献

{"title":"FLUVIAL RESPONSES FOLLOWING VOLCANIC ERUPTIONS: THE BLANCO-ESTE RIVER, SOUTHERN CHILE","authors":"A. Iroumé, V. Zingaretti, D. Vericat, Johnathan Tenny, M. Llena, R. Batalla","doi":"10.2495/RBM190031","DOIUrl":"https://doi.org/10.2495/RBM190031","url":null,"abstract":"We examine the fluvial response of the River Blanco-Este (Chile) following the 1961 and 2015 eruptions of the Calbuco volcano. The river drains the north-eastern flanks of the Calbuco and was heavily affected by ash fall, pyroclastic flows and post-eruption channel reworking. The long-term morphological evolution of the river is analyzed along a 6.5 km-long segment using a sequence of remote aerial images. Since 2017, short-term fluvial responses are studied in two reaches representing the upstream and downstream parts of this segment, using multi-temporal high resolution topography and orthophotomaps obtained combining dGPS surveys and digital photogrammetry applied to photos acquired from drones, to monitor topographic changes in the channel topography and the area of exposed movable sediments, grain size and large wood deposits. Due to the lack of flow data we use photos from time-lapse cameras as a proxy to qualitatively characterize river flow. The active channel observed after the 1961 and 2015 eruptions has a similar pattern. According to the evolution of the channel morphology after the 1961 eruption, we hypothesize that the river reached a quasi-equilibrium condition in 2014, a situation severely modified by the 2015 eruption. Long-term (decadal) evolution of the river reflects the adjustment between sediment budget and channel morphology that progressively shifts from a braided pattern to a stable single-threat channel that illustrates the equilibrium between the water and sediments load, the grain-size and the gradient. The 2015 eruption increased sediment supply and modified channel morphology, a new braided configuration is observed. The annual to flood-based responses reflect the complexity of the geomorphic dynamics of the river: channel incision, development of single channel patterns and head cut erosion in the upper study reach, and continuous erosive-depositional changes of several meters thick, with evident incessant lateral migration and severe bank erosion in the downstream river reach.","PeriodicalId":390754,"journal":{"name":"River Basin Management X","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130727146","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}

{"title":"ASSESSMENT OF CLIMATE CHANGE IMPACTS ON THE HYDROLOGIC RISK BY QUANTITATIVE ALTERATION IN THE CATALAN INTERNAL BASINS","authors":"L. Soler, J. P. Arquiola, J. Álvarez, Antoni Munné Torras","doi":"10.2495/RBM190111","DOIUrl":"https://doi.org/10.2495/RBM190111","url":null,"abstract":"The Catalan Internal Basins has a peculiarity in respect of other Mediterranean basins; its total urban demand exceeds the agriculture extractions, so the returns of the wastewater treatment plants have special relevance in the total water balance. Usually, the main quantitative alterations of the hydraulic regime of the rivers are the regulation of reservoirs and the demands. The main objective of this study is to include and evaluate the quantitative pressure of urban discharges on the analysed system, in order to estimate the altered regime risk of water bodies and analyse their evolution in future scenarios of Climate Change. The tool used to achieve these goals is the Rapid Response Environmental Status (R2EA) model. Firstly, from results, the percentage of the volume dumped over the total inflows of each of the bodies is calculated and the simulated period is evaluated. Secondly, the percentage of water extraction is calculated from discharges located upstream of the intake for each of the urban demands included in the model. These indices are calculated for three Climate Change scenarios. The calculated indices analysed show that the water regime alteration by discharges mainly affects temporal water bodies. In addition, a significant risk increase during summer months is identified. Finally, we propose that the water managers should use this approach in order to characterize the vulnerability level by quantitative alteration of aquatic ecosystems.","PeriodicalId":390754,"journal":{"name":"River Basin Management X","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125142081","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}

{"title":"DERIVATION OF THE INDEX GOVERNING THE SEEPAGE FLOW AND DYNAMIC SIMILARITY CONDITION OF LEVEE FAILURES DUE TO SEEPAGE FLOW","authors":"S. Fukuoka, Kosuke Tabata","doi":"10.2495/RBM190071","DOIUrl":"https://doi.org/10.2495/RBM190071","url":null,"abstract":"It is necessary to establish an estimation method of levee weak points due to seepage flow during floods for making appropriate levee reinforcements and risk management measures in a river basin preparing for large-scale floods. The internal flow with large phreatic surface gradient in the body of the levee tends to concentrate around the landside toe of the levee during a flood event, which may trigger the levee failure. This study shows that the idea of the levee failure is effective for primary selection of dangerous levee failure positions to the seepage flow. First, the only dynamic index governing the seepage flow in soils, SFn (Seepage Flow number) is derived by nondimensionalizing Richards' governing equation for a general seepage flow. Next, by applying SFn to the seepage flow in the levee, levee vulnerability index t* is derived in the expression of a dynamic dimensionless quantity. Also, the vulnerability index of the levee on the permeable foundation is derived by using unsteady quasi two-dimensional seepage flow analysis method. Finally, the vulnerability index t* is calculated for the actual field levee and model levee experiment in which each failure mode such as leakage, sliding or collapse and breach occurred. As a result, it is confirmed that t* shows approximately common values in the field levee and model levee taking the same failure mode. Therefore, it is demonstrated that t* gives a dynamic similarity condition on the levee failure phenomena due to the seepage flow and the judge of the degree of levee failures.","PeriodicalId":390754,"journal":{"name":"River Basin Management X","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131234549","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}

{"title":"PRELIMINARY ASSESSMENT OF THE CURRENT POLLUTION STATUS OF THE RIVER ATUWARA, NIGERIA, WITHIN AN INDUSTRIAL SITE: A BIVARIATE APPROACH","authors":"O. A. Samuel, I. Tenebe, P. Emenike, Diwa I. Daniel, David O. Omole, O. Maxwell, Ngene U. Ben, Onyekweredike O. Kelechi, I. Osagie","doi":"10.2495/RBM190211","DOIUrl":"https://doi.org/10.2495/RBM190211","url":null,"abstract":"","PeriodicalId":390754,"journal":{"name":"River Basin Management X","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133763718","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}

{"title":"ASSESSING SOCIAL PERCEPTIONS OF EMERGING POLLUTANTS IN SOUTH-EAST SPAIN","authors":"María Ángeles Bernal, Pablo Aznar-Crespo, A. Jodar-Abellan, J. Melgarejo, D. Prats","doi":"10.2495/RBM190181","DOIUrl":"https://doi.org/10.2495/RBM190181","url":null,"abstract":"This project was produced under the co-finance of the European financial instrument for the Environment (LIFE) programme during the implementation of the project “LIFE EMPORE” (LIFE15 ENV/ES/000598). Pablo Aznar-Crespo and Antonio Jodar-Abellan acknowledge financial support received from the Spanish FPU scholarship for the training of university teachers. In the same way, this work has been conducted within the Catedra del Agua of the University of Alicante (https://catedradelaguaua.org/).","PeriodicalId":390754,"journal":{"name":"River Basin Management X","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131408763","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}

{"title":"LONGITUDINAL DISPERSION PREDICTION OF RIVER BALOGUN USING CONSTANT DISTANCE AND TIME APPROACH AT DIFFERENT SAMPLING TIME INTERVALS","authors":"I. Tenebe, O. A. Samuel, David O. Omole, P. Emenike, Irewole Oniemayin, Diwa I. Daniel, O. Maxwell","doi":"10.2495/RBM190201","DOIUrl":"https://doi.org/10.2495/RBM190201","url":null,"abstract":"The estimation of dispersion number or its coefficients can be used to determine the degradation capacity of rivers. This can be determined using tracer studies with the different methods found in the literature. However, for this study, the constant distance and time method was used at two different sampling time intervals to determine its value as well as the implication of being subjective in sampling time interval selection. This study showed that the dispersion number obtained from River Balogun using the Levenspiel and Smith approach at the 3 mins time interval (d=0.037152) and 5 mins interval (d=0.0214) varied by a factor of 1.76. This implies that the dispersion number could be underestimated or overestimated. Furthermore, the first sampling interval required 1.54 times more tracer concentration data than the second sampling time interval thereby incurring more cost, time and labour. Therefore, it is suggested that more sustainable approaches are developed and practised that would use limited tracer data collection for calculation as well as limit subjectivity in sampling time selection, yet give closely precise values of dispersion number.","PeriodicalId":390754,"journal":{"name":"River Basin Management X","volume":"430 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123275981","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}

{"title":"ASSESSMENT OF DAILY INTAKE OF ARSENIC AND ASSOCIATED HEALTH RISKS FOR CHILDREN","authors":"I. Tenebe, P. Emenike, Diwa I. Daniel, Aikuola A. Olumuyiwa, Chukwuka Chibuike Daniel, Olunuga Oluwatosin Gideon, A. Chukwuebuka, Umeh Chubuike, Egbu-Etu Emmanuel Etu","doi":"10.2495/RBM190191","DOIUrl":"https://doi.org/10.2495/RBM190191","url":null,"abstract":"Surface water is a major source of heavy metal contamination due to land use variabilities and can impair the health status of humans especially children when consumed. This study investigated the arsenic concentration in surface water of River Balogun in south-west Nigeria. Fifty-one samples were collected from 17 points along the river and were examined using inductively coupled plasma optical emission spectrophotometer (ICP–OES) for arsenic concentration levels and the potential of a risk due to prolonged exposures in children using average daily dose, and hazard quotient (HQ) indices were estimated. From this study, it revealed that the mean daily intake concentrations of arsenic for children were within the range of 0.0034–0.0068 mg/l and these values were below the standards for the World Health Organization. However, long term exposures could be injurious to the health of children as the HQ values were greater than one for all 51 samples. Therefore, continuous human health risk assessment, sensitization on the adverse effects on the overuse of agrochemicals in farms surrounding the rivers, intensified ecosystem services as well as best management practices for improvement of surface water in the region need to be adopted. Furthermore, elaborating on the dangers of high arsenic in water can also be a strategy in preventing children and other population groups from consuming contaminated surface waters in that vicinity.","PeriodicalId":390754,"journal":{"name":"River Basin Management X","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131793385","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}

{"title":"EFFECTS OF TEMPORAL VARIATION IN SEDIMENT REDUCTION FOLLOWING IMPROVED LAND MANAGEMENT PRACTICES ON END-OF-SYSTEM DELIVERY: A MODELLING INVESTIGATION OF A GRAZED CATCHMENT IN QUEENSLAND, AUSTRALIA","authors":"M. E. Roberts, R. Ellis","doi":"10.2495/RBM190021","DOIUrl":"https://doi.org/10.2495/RBM190021","url":null,"abstract":"The world heritage listed Great Barrier Reef (GBR) is under threat. After climate change, water quality is recognised as the greatest stress on the reef. Sediment eroded from the catchments is transported into the reef lagoon, contributing to poor water quality. Poor water quality is linked to loss of habitat, coral death, reduced coral recruitment, algal blooms, and Crown of Thorns starfish outbreaks. The Queensland Government, in collaboration with the Australian Government under the joint Reef 2050 Water Quality Improvement Plan, undertakes a regular exercise to report on the health of the GBR and to track progress across a broad range of metrics, including water quality. This exercise comprises a combination of modelling and monitoring activities. Queensland Government periodically review their modelling framework and have identified areas for model improvement. One area identified is how the effects of changed land management practices are modelled. Presently, characteristics of recovery are empirically modelled, however parameterisation is challenged by a sparsity of data. The temporal characteristics of recovery are not presently explicitly accounted for within the modelling process. This study explores the variation in modelled end-of-system sediment loads for an exemplar subcatchment as a result of employing varying temporal signatures of recovery for grazed lands. The purpose of this study is to identify whether the modelled end-of-system sediment loads are sensitive to the time-signature of recovery, to inform how land management practices are included in the models. The results show that the time-signature of recovery can have significant effects on the end-of-system sediment loads where changes in land management practices coincide with local hot-spots of sediment generation. Consideration of the temporal dynamics of erosion reduction due to different intervention strategies is essential to provide the best opportunity to meet water quality targets in the GBR lagoon.","PeriodicalId":390754,"journal":{"name":"River Basin Management X","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129828165","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}

{"title":"OBJECTIVE ASSESSMENT OF LAND USE IN HYDROGRAPHICAL STUDIES","authors":"Alfredo Ramón-Morte, José Carrión, Estela García Botella","doi":"10.2495/RBM190051","DOIUrl":"https://doi.org/10.2495/RBM190051","url":null,"abstract":"The authors are grateful to the SIOSE-INNOVA Project (CSO2016-79420-R AEI/FEDER UE) and Interuniversity Institute of Geography, University of Alicante.","PeriodicalId":390754,"journal":{"name":"River Basin Management X","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129148831","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}

{"title":"ASSESSMENT OF THE ECOLOGICAL POTENTIAL OF HEAVILY MODIFIED WATER BODIES IN THE BASILICATA REGION, ITALY: CASE STUDY OF THE AGRI RIVER BASIN","authors":"F. Arbia, Lorena Di Giuseppe, Raffaele Giampietro, M. Greco, P. Mauro, G. Martino, Annalaura Montella, G. Mussuto, E. Napoli, A. Smaldone","doi":"10.2495/RBM190141","DOIUrl":"https://doi.org/10.2495/RBM190141","url":null,"abstract":"River morphology and ecosystem are macro-indicators of climate and land-use changes as well as human activities and land policies. In the last decades, knowledge of water resources, in terms of quality, quantity, prevention and control, has quickly increased – even for the availability of advanced methodologies and technologies both for monitoring and modelling fields. Nevertheless, the objective of a good ecological status of water bodies has not yet been reached due to human pressure which still induces long term impacts as well as direct or indirect physical constraints. In such a context, the European Water Framework Directive introduces the concepts of artificial water bodies (AWB) and heavily modified water bodies (HMWB) and states that in such cases good ecological potential must be reached while good ecological status is required only for natural water bodies (NWB). Further, the methodologies proposed for the AWB and HMWB need a wide set of parameters and measurements, which are not always systematically available, inducing further actions and analyses in order to evaluate the quality level of the water bodies. Moreover, the AWB or HMWB classification represents an opportunity to resize the measures addressed to achieve good ecological status both in terms of economic engagement and timing with relevant consequences on water resource planning and management. The paper deals with these issues and synthetically reports the work done on the whole Lucanian river network (Basilicata region, Southern Italy) and also presents the Agri River case study in order to classify, as best as possible, AWB, HMWB and NWB as well as to support survey planning.","PeriodicalId":390754,"journal":{"name":"River Basin Management X","volume":"309 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122803521","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}