Journal of Hydro-environment Research最新文献

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Piping fish over dams 用管道把鱼放过水坝
IF 2.8 3区 环境科学与生态学
Journal of Hydro-environment Research Pub Date : 2021-11-01 DOI: 10.1016/j.jher.2021.07.002
William L. Peirson , John H. Harris , Richard T. Kingsford , Xi Mao , Stefan Felder
{"title":"Piping fish over dams","authors":"William L. Peirson ,&nbsp;John H. Harris ,&nbsp;Richard T. Kingsford ,&nbsp;Xi Mao ,&nbsp;Stefan Felder","doi":"10.1016/j.jher.2021.07.002","DOIUrl":"10.1016/j.jher.2021.07.002","url":null,"abstract":"<div><p>Hydraulic structures disrupt fish migration thereby contributing to declines in fish populations around the world. Methods for piping fish upstream over dams can offer much steeper lift than conventional fishways. We describe the lifting mechanism of a tube fishway, demonstrated using numerical modelling, verified by a physical model. Efficacy is demonstrated by safely lifting two species of Australian native fish over 8 m up an embankment. Significant volumes of water can be transported from a chamber at the foot of a dam over its crest using simple conduits and two valves. Unsteady flow contributes entirely or significantly to the volume of water lifted. We explore how this piped system could be scaled up, while controlling turbulence impacts on fish. We propose new methods of characterising hydraulic efficiency for fishways that recognise the energy used and the value of the water discharged.</p></div>","PeriodicalId":49303,"journal":{"name":"Journal of Hydro-environment Research","volume":"39 ","pages":"Pages 71-80"},"PeriodicalIF":2.8,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46817493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Design of optimal environmental flow regime at downstream of reservoirs using wetted perimeter-optimization method 用湿周优化方法设计水库下游的最优环境流态
IF 2.8 3区 环境科学与生态学
Journal of Hydro-environment Research Pub Date : 2021-11-01 DOI: 10.1016/j.jher.2021.09.001
Mahdi Sedighkia , Bithin Datta , Asghar Abdoli
{"title":"Design of optimal environmental flow regime at downstream of reservoirs using wetted perimeter-optimization method","authors":"Mahdi Sedighkia ,&nbsp;Bithin Datta ,&nbsp;Asghar Abdoli","doi":"10.1016/j.jher.2021.09.001","DOIUrl":"10.1016/j.jher.2021.09.001","url":null,"abstract":"<div><p>Conflict between water demand and environmental flow requirements is a challenging aspect in the reservoir management. Hence, optimizing environmental flow regime is one of the most important tasks at downstream of the large dams. The present study proposes a coupled simulation–optimization method based on the wetted perimeter method as an assessment method of the environmental flow and optimization of the reservoir operation to minimize difference between habitat loss and water demand loss using different metaheuristic algorithms. Moreover, the fuzzy TOPSIS as the decision-making system was applied for ranking the optimization algorithms. Indices including reliability index, vulnerability index, root mean square error and mean absolute error were utilized as criteria to measure the system performance and to select the best algorithm. Based on the results, gravity search algorithm (GSA) was the best method to optimize environmental flow regime at downstream of the reservoir in the case study. The proposed method is able to optimize environmental flow to minimize conflicts between human’s needs and aquatic’s needs considering storage constraints in the reservoir management. The proposed method might minimize negotiations between environmental managers and stakeholders. Furthermore, it should be noted that original wetted perimeter method is not able to provide optimal environmental flow regime based on a balance between users and constraints in the reservoir management such as storage constraints. The proposed method converts wetted perimeter method from an assessment method to a simulation–optimization method for optimizing environmental flow at downstream of the reservoirs.</p></div>","PeriodicalId":49303,"journal":{"name":"Journal of Hydro-environment Research","volume":"39 ","pages":"Pages 1-14"},"PeriodicalIF":2.8,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49600293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Surface wave measurements with IoT image processing 物联网图像处理的表面波测量
IF 2.8 3区 环境科学与生态学
Journal of Hydro-environment Research Pub Date : 2021-11-01 DOI: 10.1016/j.jher.2021.07.001
Yuying Wei , Dharma Sree , Chun Yang , Adrian Wing-Keung Law
{"title":"Surface wave measurements with IoT image processing","authors":"Yuying Wei ,&nbsp;Dharma Sree ,&nbsp;Chun Yang ,&nbsp;Adrian Wing-Keung Law","doi":"10.1016/j.jher.2021.07.001","DOIUrl":"10.1016/j.jher.2021.07.001","url":null,"abstract":"<div><p>This study develops two different approaches to perform temporal and spatial measurements of surface wave profile for experimental studies in transparent wave flumes. Both are based on image acquisition and processing with an Internet of Things (IoT) system consisting of three sets of GoPro camera cum Raspberry<span> Pi connected wirelessly together in a local LAN. The first approach uses advanced edge algorithms with perspective transformation of the multiple cameras for the detection, while the second approach adopts Convolutional Neural Network (CNN) algorithms instead with training of the processed image data using information from additional discrete probes installed. Their accuracy is assessed under a range of experimental conditions of regular and irregular waves with different wave heights and periods, based on metrics that consist of the average errors of the predicted water surface profile as well as position errors for wave crests and troughs. The effects on the measurement accuracy due to the image acquisition frequency, camera resolution and camera location are also investigated. The results show that higher wave steepnesses generally lead to larger detection errors, and measurements for irregular waves are also more challenging. In addition, positioning the cameras closer to the wave flume sidewalls yields better detection results as expected, particularly in resolving wave crests and troughs, although the field of view narrows at the same time. However, higher video frequencies and camera resolutions might not necessarily improve the accuracy contrary to common expectation due to jaggedness in the image processing. Overall, both approaches are shown to be viable for the measurement of wave profile in the laboratory. The first approach is more straight forward in terms of implementation, and it performs well for regular wave conditions. The second approach requires more complex training of the neural networks, but its accuracy is significantly higher particularly for irregular waves.</span></p></div>","PeriodicalId":49303,"journal":{"name":"Journal of Hydro-environment Research","volume":"39 ","pages":"Pages 60-70"},"PeriodicalIF":2.8,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49305176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Using CANARY event detection software for water quality analysis in the Milwaukee River 使用CANARY事件检测软件对密尔沃基河进行水质分析
IF 2.8 3区 环境科学与生态学
Journal of Hydro-environment Research Pub Date : 2021-09-01 DOI: 10.1016/j.jher.2021.06.003
Nabila Nafsin, Jin Li
{"title":"Using CANARY event detection software for water quality analysis in the Milwaukee River","authors":"Nabila Nafsin,&nbsp;Jin Li","doi":"10.1016/j.jher.2021.06.003","DOIUrl":"10.1016/j.jher.2021.06.003","url":null,"abstract":"<div><p>Urban water sources are susceptible to various contamination events as a result of natural, accidental, and human-induced occurrences. An early warning monitoring system provides timely information on changes in urban water quality. In this study, an analysis was made with CANARY event detection software (EDS) to monitor water quality parameters in river water and to identify the onset of anomalous water quality periods. Water quality signals including pH, conductivity, and turbidity from the Milwaukee River over specified periods during the summer season of 2018–2020 were employed as inputs to event detection algorithms in CANARY. The data analysis results show that CANARY can be useful as an early warning system for monitoring contamination in urban water sources and help to identify abnormal conditions quickly. The sensibility of the model relies on optimizing the configuration parameters, which involves selecting the ideal set of parameters for the event detection algorithm and adjusting the BED parameters to increase or decrease the probability of generating an alarm. The number of events reported between the Linear Prediction Correction Filter (LPCF) and Multivariate Nearest Neighbor (MVNN) algorithms varied as a result of different residual calculation mechanisms. Climate factors that contributed to the abnormal water quality events in the river were examined. The analysis of rainfall on water quality was carried out using a statistical method by determining whether there is a significant difference (p-value) between the seasonal mean water quality data and the mean value of water parameters during the sampling duration. Regression analysis was also performed to estimate the best model that describes the relationship between each of the water quality parameters and temperature.</p></div>","PeriodicalId":49303,"journal":{"name":"Journal of Hydro-environment Research","volume":"38 ","pages":"Pages 117-128"},"PeriodicalIF":2.8,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41790039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Study on bioretention for stormwater management in cold climate, Part I: Hydraulics 寒冷气候下雨水管理的生物滞留研究(一)水力学
IF 2.8 3区 环境科学与生态学
Journal of Hydro-environment Research Pub Date : 2021-09-01 DOI: 10.1016/j.jher.2021.01.007
Zhan Li , Hannah Kratky , Tong Yu , Xiangfei Li , Haifeng Jia
{"title":"Study on bioretention for stormwater management in cold climate, Part I: Hydraulics","authors":"Zhan Li ,&nbsp;Hannah Kratky ,&nbsp;Tong Yu ,&nbsp;Xiangfei Li ,&nbsp;Haifeng Jia","doi":"10.1016/j.jher.2021.01.007","DOIUrl":"10.1016/j.jher.2021.01.007","url":null,"abstract":"<div><p><span>Simulated storm events were applied to four large bioretention columns to approximate 1.6 years of equivalent volume in Edmonton, Alberta’s typical climate. Summer, winter, and spring runoff were simulated in temperature-controlled laboratories with a range of −20 °C to +20 °C. During summer less porous bioretention media (i.e. loam soil) effectively weakened peak flows by &gt;83% for 1:2 year events while more porous bioretention media (i.e. sandy loam soil) maintained hydraulic conductivities &gt;9.1 cm/h. Winter operation consisted of all columns being subjected to −20 °C and then 1 °C repeatedly. Events were applied at an air temperature of 1 °C and, although frozen initially, more porous media experienced faster water breakthrough and ponding disappearance in winter indicating that hydraulic performance during intermittent warming periods in winter may be achievable. All columns’ hydraulic performance rebounded quickly in the subsequent summer. All columns successfully managed 1:2 year events in terms of </span>infiltration rate, ponding depth and duration. Preliminary results also showed that both media have the potential to manage less frequent (1:5 and 1:10 year) events.</p></div>","PeriodicalId":49303,"journal":{"name":"Journal of Hydro-environment Research","volume":"38 ","pages":"Pages 25-34"},"PeriodicalIF":2.8,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.jher.2021.01.007","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43008876","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Comparison of infiltration models to describe infiltration characteristics of bioretention 描述生物滞留物渗透特性的渗透模型比较
IF 2.8 3区 环境科学与生态学
Journal of Hydro-environment Research Pub Date : 2021-09-01 DOI: 10.1016/j.jher.2021.08.002
Jianlong Wang , Jianying Song , Hongjun Lin , Liuwei Peng , Kai Li , Zexi Wang
{"title":"Comparison of infiltration models to describe infiltration characteristics of bioretention","authors":"Jianlong Wang ,&nbsp;Jianying Song ,&nbsp;Hongjun Lin ,&nbsp;Liuwei Peng ,&nbsp;Kai Li ,&nbsp;Zexi Wang","doi":"10.1016/j.jher.2021.08.002","DOIUrl":"10.1016/j.jher.2021.08.002","url":null,"abstract":"<div><p>Bioretention is one of low-impact development measures, which widely used not only because it can reduce stormwater runoff total volume, decrease peak flow rate and delay peak flow time, but also can remove the runoff pollutants. Infiltration is an important hydrological process for bioretention to evaluate its runoff total volume reduction and pollutants removal. So, it is important to find an optimal infiltration model that can well describe the infiltration performance of bioretention. The Horton, Philip and Kostiakov infiltration models were selected to compare their accuracy when using for describe the infiltration characteristics of bioretention, and the errors between the different models simulate results and experiment results were assessed via the maximum absolute error (MAE), bias and coefficient of determination (R<sup>2</sup>). The experimental results showed that Horton model is fitting well and flexible under different experiment conditions, especially when the hydraulic head was 10 cm, with MAE of 0.50–0.81 cm/h, bias of 0.1–0.23 cm/h and R<sup>2</sup> of 0.98–0.99. R<sup>2</sup> of the Philip and Kostiakov models were all over than 0.87 at the initial infiltration period, but the model fitting accuracy decreased significantly with infiltration time elapse. Furthermore, the total runoff volume capture ratio and emptying time were advanced used to evaluate the flexibility of Horton model, and the Nash-Sutcliffe efficiency coefficients of them were over than 0.61 and 0.58, respectively. Therefore, the Horton model can be optimal selected to describe the infiltration process of bioretention and for its hydrological evaluation.</p></div>","PeriodicalId":49303,"journal":{"name":"Journal of Hydro-environment Research","volume":"38 ","pages":"Pages 35-43"},"PeriodicalIF":2.8,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44718865","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Modeling air flow in sanitary sewer systems: A review 卫生下水道系统中空气流动的建模:综述
IF 2.8 3区 环境科学与生态学
Journal of Hydro-environment Research Pub Date : 2021-09-01 DOI: 10.1016/j.jher.2020.10.003
Yu Qian , Weiyun Shao , David Z. Zhu , Khaled A.A. Mohamad , Peter M. Steffler , Stephen Edwini-Bonsu , David Yue , Dave Krywiak
{"title":"Modeling air flow in sanitary sewer systems: A review","authors":"Yu Qian ,&nbsp;Weiyun Shao ,&nbsp;David Z. Zhu ,&nbsp;Khaled A.A. Mohamad ,&nbsp;Peter M. Steffler ,&nbsp;Stephen Edwini-Bonsu ,&nbsp;David Yue ,&nbsp;Dave Krywiak","doi":"10.1016/j.jher.2020.10.003","DOIUrl":"10.1016/j.jher.2020.10.003","url":null,"abstract":"<div><p><span>Current designs of sanitary collection systems normally only consider the transport of wastewater without attention on the air movement in the sewer airspaces. Under anaerobic conditions<span>, hydrogen sulfide (H</span></span><sub>2</sub><span>S) can be generated in the liquid phase in sewer systems. H</span><sub>2</sub><span>S is corrosive to concrete and steel structures and odorous or even toxic to human, which can cause corrosion and sewer odor issues. To develop a feasible sewer corrosion and odor control strategy, it is necessary to understand the mechanisms of air flow in sewer systems for developing practical tools to predict and control the air flow. This paper comprehensively reviewed previous efforts on modeling the air flow in sewer systems and provided recommendations on predicting the air flow for engineering applications. The air flow in a single pipe was firstly reviewed followed by the air flow in sewer structures as well as air flow models in sewer networks. Some other considerations such as temperature driven flow, transient water flow, and wind effect were also reviewed. The knowledge gaps were then identified, and recommendations on the further studies were provided.</span></p></div>","PeriodicalId":49303,"journal":{"name":"Journal of Hydro-environment Research","volume":"38 ","pages":"Pages 84-95"},"PeriodicalIF":2.8,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.jher.2020.10.003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42835962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
A mechanistic model for estimating bacteria levels in stormwater ponds 估计雨水池中细菌水平的机制模型
IF 2.8 3区 环境科学与生态学
Journal of Hydro-environment Research Pub Date : 2021-09-01 DOI: 10.1016/j.jher.2021.06.002
Farzam Allafchi , Caterina Valeo , Jianxun He , Norman Neumann
{"title":"A mechanistic model for estimating bacteria levels in stormwater ponds","authors":"Farzam Allafchi ,&nbsp;Caterina Valeo ,&nbsp;Jianxun He ,&nbsp;Norman Neumann","doi":"10.1016/j.jher.2021.06.002","DOIUrl":"10.1016/j.jher.2021.06.002","url":null,"abstract":"<div><p>This paper presents a three-dimensional CFD based hydro-environmental model that simulates fate and transport of bacteria in water bodies. The model numerically solves unsteady incompressible Reynolds-Averaged Navier-Stokes equations on a structured grid. Free-floating and particle-attached bacteria were modelled separately regarding both fate and transport. Therefore, a sediment transport model was integrated into the main model in order to model particle-attached bacteria transport. In addition, Volume of Fluid approach was implemented to capture the water surface movements. Wind effect was also considered in the modelling using shear stress on the water surface. Since stormwater reuse is the source of some public health concerns, a stormwater pond was chosen as the test case for the model. The model was applied to simulate the distribution of bacterial indicator organisms in the Inverness Stormwater Pond in Calgary, Alberta, which is a large T-shaped pond with several inlets and outlets. The bacteria distribution in the pond was simulated for three rain events that occurred in the area. In six locations of the pond the modelled bacteria distribution was compared to collected data using non-dimensional bacteria concentrations. The comparison showed good agreement and indicated that the middle of the pond, close to the surface had the lowest levels of bacteria and thus, was considered the optimal location for withdrawal for reusing pond water. Furthermore, planting a tree barrier on the north bank of the West wing of the pond was shown to mitigate bacteria transport away from the inlets into the pond body and substantially decrease the risk of contamination at the optimal water withdrawal location.</p></div>","PeriodicalId":49303,"journal":{"name":"Journal of Hydro-environment Research","volume":"38 ","pages":"Pages 14-24"},"PeriodicalIF":2.8,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41593676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Enhancing the effectiveness of urban drainage system design with an improved ACO-based method 用改进的aco方法提高城市排水系统设计的有效性
IF 2.8 3区 环境科学与生态学
Journal of Hydro-environment Research Pub Date : 2021-09-01 DOI: 10.1016/j.jher.2020.11.002
Hang Yin , Feifei Zheng , Huan-Feng Duan , Qingzhou Zhang , Weiwei Bi
{"title":"Enhancing the effectiveness of urban drainage system design with an improved ACO-based method","authors":"Hang Yin ,&nbsp;Feifei Zheng ,&nbsp;Huan-Feng Duan ,&nbsp;Qingzhou Zhang ,&nbsp;Weiwei Bi","doi":"10.1016/j.jher.2020.11.002","DOIUrl":"10.1016/j.jher.2020.11.002","url":null,"abstract":"<div><p>In the context of climate change and urbanization, urban floods have been one of the major issues around the world, causing significant impacts on the society and environment. To effectively handle these floods, an appropriate design of the urban drainage system (UDS) is highly important as its function can significantly influence the flooding severity and distribution. In recent years, evolutionary algorithms (EAs) have been increasingly used to design UDS due to their great ability in identifying optimal solutions. However, low computational efficiency and low solution practicality (i.e. the final solutions do not satisfy the design criteria) are major challenges for the majority of EA-based methods. To this end, this paper proposes an improved ant colony optimization (ACO, a typical type of EAs) based method to enhance the UDS design effectiveness, where the optimization efficiency is enhanced by initializing the ACO using an approximate design solution identified by the engineering design method, and the solution practicality is improved by explicitly accounting for the design criteria within the optimization using a proposed sampling method. The utility of the proposed method is demonstrated using two real-world UDSs with different system complexities. Results show that the proposed method can identify design solutions with significantly improved efficiency and solution practicality compared to the traditional design approach, with advantages being more prominent for larger UDS design problems. The proposed method can be used by researchers/ practitioners to explore and develop better understanding of the UDS design alternatives under various challenges of climate change and rapid urbanization.</p></div>","PeriodicalId":49303,"journal":{"name":"Journal of Hydro-environment Research","volume":"38 ","pages":"Pages 96-105"},"PeriodicalIF":2.8,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.jher.2020.11.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48918878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
Investigation on the lateral anti-seepage capacity of a vertical soil sand layer (VSSL) in a sunken lawn 下沉式草坪垂直土砂层横向防渗能力研究
IF 2.8 3区 环境科学与生态学
Journal of Hydro-environment Research Pub Date : 2021-09-01 DOI: 10.1016/j.jher.2020.12.001
Zhiqiang Zhang , Zijian Wang , Kunyu Chen , Sheping Wang , Yanping Ding , Yuxiang Huang , Jinsuo Lu
{"title":"Investigation on the lateral anti-seepage capacity of a vertical soil sand layer (VSSL) in a sunken lawn","authors":"Zhiqiang Zhang ,&nbsp;Zijian Wang ,&nbsp;Kunyu Chen ,&nbsp;Sheping Wang ,&nbsp;Yanping Ding ,&nbsp;Yuxiang Huang ,&nbsp;Jinsuo Lu","doi":"10.1016/j.jher.2020.12.001","DOIUrl":"10.1016/j.jher.2020.12.001","url":null,"abstract":"<div><p>The use of a sunken lawn is an emerging Low Impact Development (LID) technique to effectively control storm runoffs. However, the random infiltration of rainwater that occurs due to the construction of a sunken lawn in an area of collapsible loess seriously threatens the safety of buildings around it. Setting up a vertical soil sand layer (VSSL) structure next to a sunken lawn as an anti-permeate method has been proposed in this study. To analyze the lateral anti-seepage effects of a VSSL, a sunken lawn model around a building was established based on soil physical parameters, and water seepage in the sunken lawn was investigated using a infiltration experiment and HYDRUS-2D software. The results show that the anti-seepage effects of a VSSL can significantly reduce the average wetting front migration length and water content at the observation points behind the sand layer. The Nash-Sutcliff Efficiency (NSE) index was used to evaluate the accuracy and reliability of the HYDRUS-2D model. The values of the NSE index obtained were greater than 0.82 (varied between 0.82 and 0.98) which confirmed the applicability of the HYDRUS-2D software in accurately describing the hydraulic behavior of the lateral anti-seepage effects of the VSSL in a sunken lawn. Simulation infiltration tests showed that, on the side of the VSSL, the wetting front migration length was reduced by 55.5% on average, and the water content of the observation points behind the sand layer was reduced by 40.5%, increasing the stability of the loess around the building infrastructure. The results are of value in practical applications, such as for devising engineering or non-engineering measures to avoid loess collapsibility around sunken lawns.</p></div>","PeriodicalId":49303,"journal":{"name":"Journal of Hydro-environment Research","volume":"38 ","pages":"Pages 44-52"},"PeriodicalIF":2.8,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.jher.2020.12.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42577138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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