ISH Journal of Hydraulic Engineering最新文献_第10页

Adaptive neuro-fuzzy interface system based performance monitoring technique for hydropower plants 基于自适应神经模糊接口系统的水电厂性能监测技术

ISH Journal of Hydraulic Engineering Pub Date : 2022-08-28 DOI: 10.1080/09715010.2022.2115320

K.Vimala Kumar, R. Saini

{"title":"Adaptive neuro-fuzzy interface system based performance monitoring technique for hydropower plants","authors":"K.Vimala Kumar, R. Saini","doi":"10.1080/09715010.2022.2115320","DOIUrl":"https://doi.org/10.1080/09715010.2022.2115320","url":null,"abstract":"ABSTRACT Energy has played a significant role in developing civilization, but the continuous use of fossil fuels has hampered the environment. Hydropower is the alternative to fossil fuels. But most of the hydropower plants in hilly areas suffer from silt erosion problems. Erosion of underwater parts creates vibration and noise and reduces machine efficiency. Therefore, online monitoring of turbines and other equipment is necessary to minimize losses due to erosion and part-load operation. Various studies are reported in the literature and found that correlation-based machine efficiency monitoring is one of the popular techniques. ANN method is useful for system modeling with a wide range of applications. However, despite the excellent classification capacities, its development can be time-consuming, computer-intensive, and prone to overfitting. In this paper, an Adaptive Neuro-Fuzzy Interface System (ANFIS) has been utilized to develop a correlation that removes the drawbacks of ANN and can predict the efficiency of the machine with an R2-value of 0. 99,976 having a Mean Absolute Percentage Error (MAPE) of 0.0108% at 0.06482% Root Mean Square Percentage Error (RMSPE).","PeriodicalId":38206,"journal":{"name":"ISH Journal of Hydraulic Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83404450","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: 9

Energy dissipation for supercritical flows by using screens with triangular shape openings 三角形开口筛网对超临界流动的能量耗散

ISH Journal of Hydraulic Engineering Pub Date : 2022-08-03 DOI: 10.1080/09715010.2022.2107880

U. Singh, P. Roy

{"title":"Energy dissipation for supercritical flows by using screens with triangular shape openings","authors":"U. Singh, P. Roy","doi":"10.1080/09715010.2022.2107880","DOIUrl":"https://doi.org/10.1080/09715010.2022.2107880","url":null,"abstract":"ABSTRACT In the present study, experiments were conducted in the laboratory to investigate the effectiveness of perforated screens having triangular shape openings in dissipating the energy of supercritical flows. The porosity of the perforated screens was maintained at 45%. Experiments were conducted by placing the screens at an angle α (45°, 75°, 90°, 120°, and 135°) with the upstream direction of supercritical flow. Further, for each of the angular positions, the screens were used both in single and double layers. In the case of the double layer, the two screens were placed at a 2.5 cm gap. The supercritical flow when collided with the screen, a hydraulic jump was created in the immediate upstream of the screen. In all the experiments, the Froude number, F1 of the supercritical flow approaching the screen was varied from 3.16 to 19.26. The relative energy dissipation between the upstream and downstream of the screen was significantly larger than that due to the classical hydraulic jumps. Further, it was found that this relative energy loss varied non-linearly with respect to F1, but the variation was negligible due to screen angles α.","PeriodicalId":38206,"journal":{"name":"ISH Journal of Hydraulic Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77462861","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

Bulk Flow Characteristics of a Gravel Bed River with Instream Emergent Vegetation 含河道突发性植被的砾石河床体流量特征

ISH Journal of Hydraulic Engineering Pub Date : 2022-08-02 DOI: 10.1080/09715010.2022.2107881

Sadegh Derakhshan, H. Afzalimehr, Vijay Singh

{"title":"Bulk Flow Characteristics of a Gravel Bed River with Instream Emergent Vegetation","authors":"Sadegh Derakhshan, H. Afzalimehr, Vijay Singh","doi":"10.1080/09715010.2022.2107881","DOIUrl":"https://doi.org/10.1080/09715010.2022.2107881","url":null,"abstract":"ABSTRACT Aquatic vegetation and morphology are integral components of fluvial systems, study of which is important due to ecological and engineering projects. Often, studies in fluvial systems are carried out in the laboratory as collecting data in the field is expensive and difficult, and even risky. A field study was carried out to measure the hydraulic and geometric parameters of the bed and the banks of a gravel bed river with instream emergent vegetation in northern Iran. The aim of this study was to gain insight into the effect of bed forms and vegetation patches on flow resistance and distribution of velocity and bed shear stress. The boundary layer characteristics method was employed to calculate the shear velocity and friction factor, the resulted friction values are compared with that of Manning’s equation. The friction of bed forms was estimated using a linear superposition of friction. Results showed that the boundary layer characteristics method was suitable for calculating the shear velocity under various conditions, moreover, the distribution of velocity and bed shear stress were discussed. The findings of this study will be useful in river management and restoration.","PeriodicalId":38206,"journal":{"name":"ISH Journal of Hydraulic Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81181500","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

Current meter methodology for discharge measurement in circular pipe 圆管放电测量的电流计方法

ISH Journal of Hydraulic Engineering Pub Date : 2022-08-02 DOI: 10.1080/09715010.2022.2107879

Cristian Purece, V. Panaitescu

引用次数: 0

Numerical investigation of wave impact forces on coastal deck structures with girders along the West Coast of India in changing climate 气候变化条件下印度西海岸带梁甲板结构波浪冲击力的数值研究

ISH Journal of Hydraulic Engineering Pub Date : 2022-07-28 DOI: 10.1080/09715010.2022.2104623

Akhila Padmajan, Rameeza Moideen, Manas Ranjan Behera

{"title":"Numerical investigation of wave impact forces on coastal deck structures with girders along the West Coast of India in changing climate","authors":"Akhila Padmajan, Rameeza Moideen, Manas Ranjan Behera","doi":"10.1080/09715010.2022.2104623","DOIUrl":"https://doi.org/10.1080/09715010.2022.2104623","url":null,"abstract":"ABSTRACT Coastal structural damage has been a serious issue in the past decades due to changes in various ocean environmental parameters and increased frequency of extreme events. The present study focuses on the estimation of wave impact forces on typical deck structures at Indian port locations in a changing climate scenario. The effect of climate change has been investigated by applying the future ocean climate characteristics, such as future wave height conditions and sea-level rise by the year 2100 using RCP 4.5 scenario obtained from the recent studies. The numerical investigations were carried out by generating solitary waves in a numerical wave tank modelled using an open-source CFD model REEF3D. Comparison of peak wave impact force and pressure distribution due to climate change on a model and prototype deck structure in the elevated condition is carried out to investigate the scale effects. Overall, the study concluded that there is a significant change in both vertical and horizontal forces on coastal deck structures due to climate change, where the percentage change varies with varying airgaps and geographical locations. Investigation on prototype scale deck shows that the model scale overestimates the positive horizontal impact force to a larger extent than the vertical impact force.","PeriodicalId":38206,"journal":{"name":"ISH Journal of Hydraulic Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77015362","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

Analysis of changes in extreme rainfall characteristics over Ambica river basin, India 印度阿姆比卡河流域极端降雨特征变化分析

ISH Journal of Hydraulic Engineering Pub Date : 2022-07-26 DOI: 10.1080/09715010.2022.2098681

Zeel B Patel, S. Yadav

{"title":"Analysis of changes in extreme rainfall characteristics over Ambica river basin, India","authors":"Zeel B Patel, S. Yadav","doi":"10.1080/09715010.2022.2098681","DOIUrl":"https://doi.org/10.1080/09715010.2022.2098681","url":null,"abstract":"ABSTRACT Significant variations are detected in extreme rainfall characteristics over Ambica river basin, Gujarat. The frequent flooding in Ambica basin has become a persistent phenomenon over last decade. Based on new knowledge and understanding in Extreme Value Theory (EVT), the discrepancies in extreme rainfall characteristics over entire basin are analyzed considering the daily rainfall series of 25 rain gauge stations for period of 1961–2017. At each station, the threshold value was selected as 90th percentile rainfall for computing the excesses of Peak over Threshold (POT) series. To examine the variations in rainfall pattern, basic rainfall indices viz. total annual rainfall (PRCPTOT), rainy days (RD) and simple daily intensity index (SDII) are calculated. To assess the non-uniformity of extreme rainfall, coefficient of variation (Cv) has been found. Non-parametric tests like Modified Mann-Kendall (MMK) test and Sen’s slope test were used for evaluating the trend. The western parts of the basin show a declining trend in PRCPTOT and SDII, wherein stationarity has been observed for RD. The stations in the central region show a significantly declining trend in total annual rainfall. The SDII and RD are found to be higher and lower respectively for the stations situated in eastern parts of the basin. It has been found that 20 %, 4 % and 17 % of stations exhibit significant decreasing trends in PRCPTOT, RD and SDII respectively. The western basin has lesser values of coefficient of variation (Cv) as compared to stations in eastern part. At the majority of stations, extreme rainfall duration and frequency were found to be stationary, whereas intensity of extreme rainfall is found to be non-stationary. Also, it has been found that 16 % of stations exhibit significant decreasing trends in extreme rainfall intensity and duration, which demonstrates the consequences to water availability in near future.","PeriodicalId":38206,"journal":{"name":"ISH Journal of Hydraulic Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75733039","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

Exploring the dependence between discharge indices and catchment descriptors for suspended sediment load in Indian Rivers 探讨印度河流悬沙负荷的流量指标与流域描述符之间的相关性

ISH Journal of Hydraulic Engineering Pub Date : 2022-07-25 DOI: 10.1080/09715010.2022.2104624

S. Maheshwari, S. Chavan

{"title":"Exploring the dependence between discharge indices and catchment descriptors for suspended sediment load in Indian Rivers","authors":"S. Maheshwari, S. Chavan","doi":"10.1080/09715010.2022.2104624","DOIUrl":"https://doi.org/10.1080/09715010.2022.2104624","url":null,"abstract":"ABSTRACT In this paper, we have explored the dependence of discharge indices (and their return period) on various catchment descriptors, such as average slope, basin relief, drainage area, maximum elevation, and mean elevation. Discharge indices, viz., effective discharge, functional-equivalent discharge, and fraction-load discharge, are considered in this study. These indices characterize long-term sediment transport through stream networks and are generally adopted as design flows for restoration of streams and in geomorphic, as well as in eco-hydrologic studies. These indices (and their return period) were determined based on a continuous probability distribution (e.g. log-normal and Gamma)-based Magnitude-Frequency Analysis approach. These indices and their return period were found to have a negative correlation with all these catchment descriptors except the drainage area. This is because there is a reduction in the magnitude of discharge indices with the rise in average slope, basin relief, maximum elevation, and mean elevation, which indicates that a lesser magnitude of flows/discharges is effective in carrying a considerable amount of sediments over time as the transport of sediments is assisted by high slopes of upstream catchments, viz., headwater catchments. These correlated descriptors can be useful in the determination of indices (and their return period) for ungauged catchments.","PeriodicalId":38206,"journal":{"name":"ISH Journal of Hydraulic Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85971020","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

Effect of leakage location on pressure deficiency index of water distribution network 泄漏位置对配水管网压力亏缺指数的影响

ISH Journal of Hydraulic Engineering Pub Date : 2022-07-14 DOI: 10.1080/09715010.2022.2094731

Nidhi C Pandya, Reena Popawala, S. Yadav

引用次数: 0

Volume driven analysis for house level water supply assessment in an intermittent water supply system 间歇式供水系统中住宅水位供水评估的体积驱动分析

ISH Journal of Hydraulic Engineering Pub Date : 2022-07-12 DOI: 10.1080/09715010.2022.2098683

C. R. Suribabu, P. Sivakumar, Nivedita Sivakumar

{"title":"Volume driven analysis for house level water supply assessment in an intermittent water supply system","authors":"C. R. Suribabu, P. Sivakumar, Nivedita Sivakumar","doi":"10.1080/09715010.2022.2098683","DOIUrl":"https://doi.org/10.1080/09715010.2022.2098683","url":null,"abstract":"ABSTRACT Intermittent water supply (IWS) system delivers the drinking water for a short duration of a day. Customers’ satisfaction with such a system highly depends on the volume of water delivered at each house service connection rather than the pressure-dependent flow rate. In most of the systems, the supply is made until emptying of the source storage reservoir or tank happens. The advantaged consumers (who belong to the high-pressure zone) receive water quicker than the disadvantaged consumers. As the IWS has trusted with the volume of water delivered, volume-driven analysis (VDA) is required to understand the supply rate at demand nodes and the actual duration of supply to the consumers located across the network. Supply to each house service connection (HSC) depends on the availability of static pressure at the ferrule points in the distribution main. The aggregated volume of water that can be delivered by the node corresponding to the available pressure requires an equivalent arrangement that represents house service connections (HSCs) in the modeling. In the present work, a modified method of volume-driven analysis is presented to simulate the aggregated flow from the HSCs at each node and to evaluate the actual volume of water delivered within the supply duration. The application of the method is illustrated through a hypothetical rural water supply network. The volume of water that can be received by the group of houses and its duration of supply to fulfill the demanded volume can be obtained from the proposed analysis and also it is shown how the uncontrolled withdrawal of water affects the disadvantaged consumers in the water supply system.","PeriodicalId":38206,"journal":{"name":"ISH Journal of Hydraulic Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83275398","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: 3

Review of the state-of-the-art for monitoring urban drainage water quality using rhodamine WT dye as a tracer 罗丹明WT染料作为示踪剂监测城市排水水质的研究进展

ISH Journal of Hydraulic Engineering Pub Date : 2022-07-11 DOI: 10.1080/09715010.2022.2098682

K. Swarnkar, V. Nikam, K. Gupta, J. Pearson

{"title":"Review of the state-of-the-art for monitoring urban drainage water quality using rhodamine WT dye as a tracer","authors":"K. Swarnkar, V. Nikam, K. Gupta, J. Pearson","doi":"10.1080/09715010.2022.2098682","DOIUrl":"https://doi.org/10.1080/09715010.2022.2098682","url":null,"abstract":"ABSTRACT With increasing urbanization, wastewater and industrial effluents are being discharged into watercourses. Due to high-density development, it is difficult to construct conventional flow measurement structures like weirs. Hence, to measure the flow, dye tracing studies are an appropriate method for urban drainage channels. Dye tracing studies along with water quality monitoring can be analyzed to understand the behavior of pollutants in specific sections of the study area. This paper presents a state-of-the-art review for employing dye tracing studies to ascertain the pathways of pollutants and a case study. A dye tracing study was carried out at the Kolshet drain, Thane, India, to conceptualize contaminant transport using rhodamine WT (water tracer) dye. The study was carried out jointly by the Indian Institute of Technology Bombay, India and the University of Warwick, UK. Rhodamine WT dye was injected at the injection point and the distribution of dye concentration with time was logged with four portable fluorometers installed at measurement points. The data were analyzed and the longitudinal dispersion coefficient (‘DL’) for solute transport in the drain was computed.","PeriodicalId":38206,"journal":{"name":"ISH Journal of Hydraulic Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90982008","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