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Modelling and validation hysteresis in soil water retention curve using tomography of pore structure 用孔隙结构层析成像法模拟和验证土壤保水曲线中的滞后现象
International Journal of Water Pub Date : 2018-10-09 DOI: 10.1504/IJW.2018.10016241
A. Mady, E. Shein
{"title":"Modelling and validation hysteresis in soil water retention curve using tomography of pore structure","authors":"A. Mady, E. Shein","doi":"10.1504/IJW.2018.10016241","DOIUrl":"https://doi.org/10.1504/IJW.2018.10016241","url":null,"abstract":"Hysteresis in soil water retention curve (SWRC hysteresis) has a significant effect on soil water flow in unsaturated porous soils. The aims of the were to estimate wetting curve of the soil water retention curve based on drying curve and to study the reasons of hysteresis using tomography of pore structure. SWRC hysteresis was measured using capillarimeters for drying and wetting curves under a low soil potential. The proposed model αw = 2.5, αd was presented to calculate alpha of wetting curve (αw) based on alpha of drying curve (αd). The tomography method was used for describing the structure of porous space in the wetting and drying soils. Generally, the results of RMSE = 0.08 cm−1, GMER = 0.87, and Williams-Kloot test indicated that the proposed model can be used for estimation wetting curve under a low soil potential. Tomography of pore structure is a new technique used for describing the occurrence of hysteresis in SWRC.","PeriodicalId":39788,"journal":{"name":"International Journal of Water","volume":"12 1","pages":"370"},"PeriodicalIF":0.0,"publicationDate":"2018-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49319329","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: 5
Continuous and remote monitoring of ground water level measurement in a well 井内地下水位测量的连续远程监测
International Journal of Water Pub Date : 2018-10-09 DOI: 10.1504/IJW.2018.10016237
X. Mary, L. Rose, K. Rajasekaran
{"title":"Continuous and remote monitoring of ground water level measurement in a well","authors":"X. Mary, L. Rose, K. Rajasekaran","doi":"10.1504/IJW.2018.10016237","DOIUrl":"https://doi.org/10.1504/IJW.2018.10016237","url":null,"abstract":"Water is a primary resource and plays a significant role in human existence. All living organisms need water for their survival. About 98% of the Earth's fresh water is groundwater. To avoid scarcity, proper rain water harvesting structures need to be built in rain fed areas. However, the effectiveness of such structures can be assessed only by measuring the water recharge rate of the ground water sources like open wells and bore wells. The current work envisages the provision of a low cost long-term, continuous measurement and data logging of ground water level. In order to measure the ground water recharge, a pipe of thinner diameter is immersed into the water body (well) with pressure sensor mounted at the top. The back pressure developed in the small tube is proportional to the height of the water column inside the tube. This is measured at regular intervals and a Raspberry Pi webserver is used as data logger for long time storage. The data analysis of the stored data facilitates the water recharge capability of the well or bore well thereby indirectly measures the efficacy of the water harvesting structures in the nearby areas.","PeriodicalId":39788,"journal":{"name":"International Journal of Water","volume":"12 1","pages":"356"},"PeriodicalIF":0.0,"publicationDate":"2018-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43645984","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: 6
A new equation to predict the total potential longshore sediment transport rate in the beach ocean area 预测滩海区总潜在岸沙输沙率的新方程
International Journal of Water Pub Date : 2018-08-01 DOI: 10.1504/IJW.2018.10014774
S. Khorram, M. Vahedi
{"title":"A new equation to predict the total potential longshore sediment transport rate in the beach ocean area","authors":"S. Khorram, M. Vahedi","doi":"10.1504/IJW.2018.10014774","DOIUrl":"https://doi.org/10.1504/IJW.2018.10014774","url":null,"abstract":"This paper proposes a novel predictive formula for the estimation of the total longshore sediment transport rate (TLSTR) using the incomplete selfsimilarity (ISS) and sediment transport physics principles with the assumption that sediments are mobilised by breaking waves. The key factor in this study is the use of dimensional analysis and self-similarity concepts based on a number of independent variables to develop an integrated classical formula for the noncohesive TLSTR in marine coastal regions. To assess the prediction capability of the proposed formula, high-quality sediment transport and hydrodynamics datasets were gathered and six well-known formulae were employed for both the field and laboratory test conditions. Results show that the novel formula agrees well with both the flume and field data and it is quite suitable both for practical applications in coastal regions and for the numerical modelling of sediment transport and nearshore variations.","PeriodicalId":39788,"journal":{"name":"International Journal of Water","volume":"12 1","pages":"224"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45416544","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
Spatio-temporal analysis of the Karun River water quality 卡伦河水质时空特征分析
International Journal of Water Pub Date : 2018-08-01 DOI: 10.1504/IJW.2018.10014773
M. Moravej, I. Karimirad, K. Ebrahimi
{"title":"Spatio-temporal analysis of the Karun River water quality","authors":"M. Moravej, I. Karimirad, K. Ebrahimi","doi":"10.1504/IJW.2018.10014773","DOIUrl":"https://doi.org/10.1504/IJW.2018.10014773","url":null,"abstract":"The spatio-temporal variations of the water quality of the Karun River using national sanitation foundation water quality index (NSFWQI) are analysed in this paper using time series analysis and geographic information system (GIS). Monthly data including pH, temperature, dissolved oxygen (DO), five-day biochemical oxygen demand (BOD), total solids (TS), PO43–, NO3–, turbidity and fecal coliform are analysed for 2007-2012. Calculated NSFWQI time series during the study period shows that the water quality of the river lies in the medium class. The results of time series analysis show that periodicity and trend are not significant in the majority of stations. The spatial analysis results demonstrate that the water quality in Ahwaz urban area is slightly poorer than in the rest of the river. Overall, the spatio-temporal distribution of the NSFWQI values indicates that changes are negligible and show the balance between the pollutants input and self-purification capacity of the river.","PeriodicalId":39788,"journal":{"name":"International Journal of Water","volume":"12 1","pages":"208"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45800588","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
Application of global precipitation dataset for drought monitoring and forecasting over the Lake Urmia basin with the GA-SVR model 基于GA-SVR模型的全球降水数据集在乌尔米亚湖流域干旱监测预报中的应用
International Journal of Water Pub Date : 2018-08-01 DOI: 10.1504/IJW.2018.10014781
Edris Ahmadebrahimpour, B. Aminnejad, K. Khalili
{"title":"Application of global precipitation dataset for drought monitoring and forecasting over the Lake Urmia basin with the GA-SVR model","authors":"Edris Ahmadebrahimpour, B. Aminnejad, K. Khalili","doi":"10.1504/IJW.2018.10014781","DOIUrl":"https://doi.org/10.1504/IJW.2018.10014781","url":null,"abstract":"In the present study, the accuracy of the climate research unit (CRU) precipitation data was assessed as an alternative source instead of in situ data for monitoring the drought in the Lake Urmia Basin area during the period from 1984 to 2013. Later, a genetic algorithm-support vector regression (GA-SVR) model was utilised in order to forecast drought conditions up to four months ahead. The results demonstrated that the CRU data had acceptable accuracy in drought monitoring so that in at least 75% of the cases, there was no difference between the monitored drought classed through observed data and CRU data. In the forecasting section, the results showed two general patterns. The first pattern indicated a descending trend of forecast accuracy with an increase in the lead-times ahead of forecasts; the second pattern revealed the ascending trend of forecast accuracy, with an increase in the SPI scale.","PeriodicalId":39788,"journal":{"name":"International Journal of Water","volume":"12 1","pages":"262"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45393852","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Development of water information communication framework 水信息交流框架的开发
International Journal of Water Pub Date : 2018-08-01 DOI: 10.1504/IJW.2018.093676
Z. Othman, A. Ya’acob, Wan Nur’ashiqin Wan Mohamad, R. A. Latiff
{"title":"Development of water information communication framework","authors":"Z. Othman, A. Ya’acob, Wan Nur’ashiqin Wan Mohamad, R. A. Latiff","doi":"10.1504/IJW.2018.093676","DOIUrl":"https://doi.org/10.1504/IJW.2018.093676","url":null,"abstract":"Information is the first step to solutions towards awareness of the need for improved water management. Recognising the right information to be communicated well to the community and the public is invaluable to change behaviour and attitude for better and sustainable water quality and supply. The paper aims to develop a water communication framework that focuses on the prioritised information and the relevant communication methods that are needed to raise water information awareness among the community. The findings reveal the prioritised information that include the level of awareness, the water quality and quantity as well as the communication and information. Public television appears as one major source of information most preferred prior to internet sources. These findings had contributed to the development of the water communication framework which was adopted for a water carnival held to educate and promote water information awareness to the community.","PeriodicalId":39788,"journal":{"name":"International Journal of Water","volume":"12 1","pages":"278-286"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/IJW.2018.093676","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48569126","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
Modelling non-stationary extreme streamflow in Peninsular Malaysia 马来西亚半岛非平稳极端水流的模拟
International Journal of Water Pub Date : 2018-05-03 DOI: 10.1504/IJW.2018.10012408
N. Jan, A. Shabri, Jean Hounkpè, Basri Badyalina
{"title":"Modelling non-stationary extreme streamflow in Peninsular Malaysia","authors":"N. Jan, A. Shabri, Jean Hounkpè, Basri Badyalina","doi":"10.1504/IJW.2018.10012408","DOIUrl":"https://doi.org/10.1504/IJW.2018.10012408","url":null,"abstract":"Global change has raised concerns among hydrologists about the use of the stationary assumption (independent and identically distributed flood series) in infrastructure-designed methods. This confirms the necessity of evaluating the stationary or non-stationary behaviour of hydrological variables before deriving flood plans for infrastructure projects and flood mitigation. Trends were evaluated in the annual maximal streamflow of 49 stations in Peninsular Malaysia, using the Mann Kendall and Spearman Rho trend tests. Three models, a stationary model (GEV0) and two non-stationary models, with: 1) location parameter; 2) location and log-transformed scale parameters as a linear function of time (GEV2), were considered for stations with significant trend. It was found that a quarter of the analysed stations show statistically significant trends in their annual maximal streamflow. These results indicate the importance of taking into consideration the non-stationary behaviour of the flood series in order to improve the quality of flood estimation.","PeriodicalId":39788,"journal":{"name":"International Journal of Water","volume":"12 1","pages":"116"},"PeriodicalIF":0.0,"publicationDate":"2018-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46638738","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: 12
Investigating the relationship between physical characteristics of watersheds and nonlinearity of daily streamflow processes 研究流域物理特征与日流过程非线性之间的关系
International Journal of Water Pub Date : 2018-05-03 DOI: 10.1504/IJW.2018.10012409
Mahshid Khazaiee, K. Khalili, J. Behmanesh
{"title":"Investigating the relationship between physical characteristics of watersheds and nonlinearity of daily streamflow processes","authors":"Mahshid Khazaiee, K. Khalili, J. Behmanesh","doi":"10.1504/IJW.2018.10012409","DOIUrl":"https://doi.org/10.1504/IJW.2018.10012409","url":null,"abstract":"Using time series models is one of the practical methods for simulation and prediction of hydrological data. But often, without examining linear or nonlinear system, common linear time-series models are used. And it is expected that streamflow nonlinearity is heavily influenced by physiographic characteristics of the watershed. In this study, using BDS test, nonlinearity of daily streamflow was examined, then its relationship with the watershed slope and area of hydrometric stations was examined. ADF test was used to test stationarity of data time series. The results of ADF test revealed that with the elimination of non-stationarity factors, streams' flow series become stationary. Also, BDS test results showed that flow was nonlinear. In examining the relationship between streamflow nonlinearity and watershed area, the results revealed that despite R2 = 0.91, nonlinearity of flow was in the significant relationship with the third power area. Regarding the relationship between streamflow nonlinearity and watershed slope, no significant relationship was found. It should be noted that the relationship between these two parameters and the intensity of nonlinearity is the novelty of this article.","PeriodicalId":39788,"journal":{"name":"International Journal of Water","volume":"12 1","pages":"141"},"PeriodicalIF":0.0,"publicationDate":"2018-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48933333","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
VASPCALM module for frequency regulation as a pump control method in EPANET 用于频率调节的VASPCALM模块作为EPANET中的泵控制方法
International Journal of Water Pub Date : 2018-05-03 DOI: 10.1504/IJW.2018.10012410
D. Vouk, D. Nakić, I. Halkijevic
{"title":"VASPCALM module for frequency regulation as a pump control method in EPANET","authors":"D. Vouk, D. Nakić, I. Halkijevic","doi":"10.1504/IJW.2018.10012410","DOIUrl":"https://doi.org/10.1504/IJW.2018.10012410","url":null,"abstract":"Frequency regulation as a pump control method is an efficient method for pressure control in pressurised water supply systems, and consequently for water loss control and power consumption control. Operation of pumps with frequency regulation can be successfully simulated by means of mathematical modelling. The paper describes the basic principles of frequency regulation and analyses its control and operation in the free computer software EPANET. The developed auxiliary module VASPCALM automatically generates a number of pump operation controls for constant or proportional pressure value at the required model junction. The application of the module on the actual water supply system Velika Gorica (Croatia) proves that simple and efficient modelling of pump operation with frequency regulation in EPANET is possible, with an acceptable degree of accuracy. Also, the use of the VASPCALM module considerably facilitates the mathematical modelling of variable speed pumps in EPANET.","PeriodicalId":39788,"journal":{"name":"International Journal of Water","volume":"12 1","pages":"158-169"},"PeriodicalIF":0.0,"publicationDate":"2018-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49571891","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
Hydrological response to climate change in a high altitude catchment 高海拔流域对气候变化的水文响应
International Journal of Water Pub Date : 2018-05-03 DOI: 10.1504/IJW.2018.10012411
Yasir Altaf, M. Ahangar, M. Fahimuddin
{"title":"Hydrological response to climate change in a high altitude catchment","authors":"Yasir Altaf, M. Ahangar, M. Fahimuddin","doi":"10.1504/IJW.2018.10012411","DOIUrl":"https://doi.org/10.1504/IJW.2018.10012411","url":null,"abstract":"Different climate models are linked to the coupled river and hydrological model MIKE SHE-MIKE-11 to evaluate the future impact of climate change on hydrology in the Lidder sub basin of the Jhelum Basin. The coupled hydrological model was calibrated against the observed stream flow data at Sheeshnag gauging station. The output of the model in the form of snow cover percentage was validated with the high resolution satellite-based Modis data. The outputs from five different global climate models for IPCC A1B emission scenario for future (2025, 2050, 2075 and 2100) emission scenarios were applied on a hydrological model. It was observed that at the end of 21st century the ET losses in the region is increasing, snow storage component is decreasing which is further causing the runoff in the river to increase at the end of 21st century. The contribution of base flow to the discharge in the Lidder River is increasing under all climate models except for incm3 model.","PeriodicalId":39788,"journal":{"name":"International Journal of Water","volume":"12 1","pages":"170"},"PeriodicalIF":0.0,"publicationDate":"2018-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45550923","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
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