Journal of Hydro-environment Research最新文献

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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
Performance of lot-level low impact development technologies under historical and climate change scenarios 地块级低影响开发技术在历史和气候变化情景下的表现
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.2021.07.004
Albert Z. Jiang, Edward A. McBean
{"title":"Performance of lot-level low impact development technologies under historical and climate change scenarios","authors":"Albert Z. Jiang,&nbsp;Edward A. McBean","doi":"10.1016/j.jher.2021.07.004","DOIUrl":"10.1016/j.jher.2021.07.004","url":null,"abstract":"<div><p>Low impact development (LID) systems have potential to make urban cities more sustainable and resilient, particularly under challenging climate conditions. To quantify performance capabilities, modeling results for an array of combinations of LIDs are described using PCSWMM at lot-level to examine performance of individual LIDs on volume and peak flow reductions. Among the four LIDs studied: rain barrel (RB), vegetative swale (VS), bioretention cell (BC), and permeable pavement (PP), PP at lot-level demonstrated the best capability for reducing surface runoff volumes and peak runoff rates under historical weather conditions, while BC showed similar capability for reduction of runoff volumes but minimal peak flow reduction. With PP as the controlling method at lot-level, the maximum percentage reduction of runoff volume for a 2-year storm is 58% whereas for a 100-year storm, the runoff volume reduction is 20%. These results mean the extent of flooding that may arise from the 100-year storm is reduced, but not eliminated. Effectively, the 100-year storm volumes with LID are devolved to have flooding equivalent to a 25-year storm. Under climate change scenarios, performance for all LIDs declined at various levels, where BC was the most resilient LID for a climate change scenario, such that projected 2-year or 5-year storms with climate change will have its impact devolved with LID in place, to result in similar volumes and peaks without LID under historical conditions. Furthermore, even with an assembly of lot-level LIDs distributed throughout the community, there is not attenuation to substantial degrees of flooding for major events, but there can be effective control for water quantity for small (2- to 5-years in particular) storm events.</p></div>","PeriodicalId":49303,"journal":{"name":"Journal of Hydro-environment Research","volume":"38 ","pages":"Pages 4-13"},"PeriodicalIF":2.8,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47108817","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
Integrated urban stormwater management: Evolution and multidisciplinary perspective 城市雨水综合管理:演变与多学科视角
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.2020.11.003
Jean-Luc Bertrand-Krajewski
{"title":"Integrated urban stormwater management: Evolution and multidisciplinary perspective","authors":"Jean-Luc Bertrand-Krajewski","doi":"10.1016/j.jher.2020.11.003","DOIUrl":"10.1016/j.jher.2020.11.003","url":null,"abstract":"<div><p><span>This paper proposes an introductory review of the historical evolution of urban stormwater management<span>, as well as of current trends, challenges, and changes of paradigm. It reminds us first that most of the existing urban stormwater infrastructures in developed cities are based on the modern urban sewer systems developed in the second half of the 19</span></span><sup>th</sup><span> century in Europe. They have been built and for decades managed almost solely by urban sanitation and water specialists, relatively independently of other technical services and, more generally, of other stakeholders in cities. They contributed significantly to public health and fast conveyance of stormwater outside the cities. However, at the turn of the 1970s, it became evident with increasing urbanisation that they also had drawbacks: artificialisation of soils, reduction of aquifer recharge, pollution of surface water and ecological impacts, etc. The paper indicates how new concepts and paradigms thereafter emerged to manage stormwater by means of more sustainable and integrated approaches, aiming to solve the problems engendered by the previous approaches. This integration embraces more and more disciplines and issues, far beyond the traditional field of urban water engineers and specialists. The paper attempts to explain the need for this evolution, making urban stormwater management more much complex, dealing and interacting with ecology, biodiversity, bioinspiration, architecture, landscape and water values, citizens’ well-being, history, culture, and socio-economic aspects.</span></p></div>","PeriodicalId":49303,"journal":{"name":"Journal of Hydro-environment Research","volume":"38 ","pages":"Pages 72-83"},"PeriodicalIF":2.8,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45924896","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: 11
Sustainable urban drainage: Current interests and future needs 可持续城市排水:当前利益与未来需求
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.2021.09.002
David Z. Zhu, Tong Yu, Yanchen Liu, Yongchao Zhou
{"title":"Sustainable urban drainage: Current interests and future needs","authors":"David Z. Zhu,&nbsp;Tong Yu,&nbsp;Yanchen Liu,&nbsp;Yongchao Zhou","doi":"10.1016/j.jher.2021.09.002","DOIUrl":"10.1016/j.jher.2021.09.002","url":null,"abstract":"","PeriodicalId":49303,"journal":{"name":"Journal of Hydro-environment Research","volume":"38 ","pages":"Pages 1-3"},"PeriodicalIF":2.8,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48781924","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
Effects of climate and land use changes on stream flow of Chitral river basin of northern highland Hindu-Kush region of Pakistan 气候和土地利用变化对巴基斯坦兴都库什北部高地吉德拉尔河流域水流的影响
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.2021.08.001
Shakeel Ahmad , Haifeng Jia , Zhengxia Chen , Qian Li , Dingkun Yin , Muhammad Israr , Waseem Hayat , Hazrat Bilal , Rasheed Ahmed , Anam Ashraf
{"title":"Effects of climate and land use changes on stream flow of Chitral river basin of northern highland Hindu-Kush region of Pakistan","authors":"Shakeel Ahmad ,&nbsp;Haifeng Jia ,&nbsp;Zhengxia Chen ,&nbsp;Qian Li ,&nbsp;Dingkun Yin ,&nbsp;Muhammad Israr ,&nbsp;Waseem Hayat ,&nbsp;Hazrat Bilal ,&nbsp;Rasheed Ahmed ,&nbsp;Anam Ashraf","doi":"10.1016/j.jher.2021.08.001","DOIUrl":"10.1016/j.jher.2021.08.001","url":null,"abstract":"<div><p>Adverse impacts of climate change on the ecosystem have been a significant concern in the last decades. However, the studies related to the impacts of climate change on water resources, especially in northern Pakistan are of great importance as this region is the main supplier of freshwater to the downstream areas. So, the present study was carried out in Chitral River Basin (CRB) to investigate the long term climatic and topographic changes. Spatiotemporal datasets from MODIS Land Cover Type product (MCD12Q1) from 2001 to 2018, ground-based observational climatic and hydrological data were used. Moreover, the Mann-Kendall trend test, linear regression analysis, correlation, and Sen’s slope values for the mean annual and seasonal flows were assessed. The acquired results show that land use changes are the key non-natural factors in transforming the ecological and hydrological processes of CRB. The mixed and evergreen forest, shrubland, savannas, and barren land respectively decreased from 0.07 to 0.03%, 0.07 to 0.05%, 3.64 to 3.25%, and 70.10 to 67.17%, from 2001 to 2018. In addition, a considerable increment in snow cover from 8.79% to 10.71%, and slight increment in grasslands, wetlands, and croplands were also found between the period of observation. In addition, total annual precipitation and mean annual stream flow showed slight upward trends. Annual increment in total rainfall and snow covered area could be the possible reasons for the observed increased river flow.</p></div>","PeriodicalId":49303,"journal":{"name":"Journal of Hydro-environment Research","volume":"38 ","pages":"Pages 53-62"},"PeriodicalIF":2.8,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48535456","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: 6
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