A class of time series urban water demand models with nonlinear climatic effects

1990 ◽  
Vol 26 (2) ◽  
pp. 169-178 ◽  
Author(s):  
Shaw-Pin Miaou
2011 ◽  
Vol 183-185 ◽  
pp. 1158-1162 ◽  
Author(s):  
Jun Liang Liu ◽  
Xu Chen ◽  
Tie Jian Zhang

Based on the traditional time series methods, this paper researched a time series-exponential smoothing model that is built by SPSS statistical analysis software. In the application of the model, the original data of water consumption were in processed by a particular smoothing method first.Secondly, the processed data were used to build a time series-exponential smoothing model. On error test, we found that this forecasting model has advantages of better effect, high precision and minor error on urban water demand forecasing.


2005 ◽  
Vol 8 (2) ◽  
pp. 153-164 ◽  
Author(s):  
Shirley Gato ◽  
Niranjali Jayasuriya ◽  
Roger Hadgraft ◽  
Peter Roberts

2010 ◽  
Vol 62 (2) ◽  
pp. 410-418 ◽  
Author(s):  
Zhang Zhi-guo ◽  
Shao Yi-sheng ◽  
Xu Zong-xue

Domestic and industrial water uses are the most important segment of urban water consumption. Traditional urban water demand models are usually based on water consumption quotas or statistical relationships, which usually overestimate urban water demands. The efficiency of domestic and industrial water uses is associated with living standards and levels of industrialization. The correlation coefficient between per capita water consumption and Engel's Coefficient in Beijing and Jinan is 0.62 and 0.53, respectively. These values are much smaller than the correlation between added industrial value and the Hoffmann Index in Beijing (0.95) and Jinan (0.90). Demand models for urban water consumption, including a domestic water demand model based on Engel's Coefficient and an industrial water demand model based on the Hoffmann Index, were developed in this study to predict urban water demand in Beijing and Jinan for 2020. The results show that the models can effectively capture the trends of urban water demand. Urban water consumption in these two cities from 1995 to 2007 was used to calibrate the models. The coefficients of determination for residential and industrial water uses were 0.93 and 0.68 in Beijing, and 0.79 and 0.64 in Jinan. Social, economic and climate scenarios for Beijing and Jinan in 2020 were generated according to the Urban Master Plans for these two cities, and they formed the basis for predictions of water consumption in 2020. The results show that total water consumption will increase by 67.6% in Jinan and 33.0% in Beijing when compared with consumption from 2007.


Author(s):  
V. Yılmaz

Abstract Water consumptions and demands by persons vary from time to time and from location to location depending on countless factors, notably, population, socio-economic and climatic variables. Today, studies which create models on water consumption of persons, using numerous methods including artificial neural networks and regression models in this regard and ensure that projections are made are ongoing. In this study; parameters affecting water consumption were examined within the scope of the study area, and the parameter reduction was realized with the help of the Factor Analysis. Then, as a new method, the Band Similarity method was used together with the Artificial Bee Colony optimization algorithm, and urban water demand models were produced and the temporal dependence of the relevant variables was examined. As a result of the study, it was seen that the Band Similarity method improved the results obtained with the optimization algorithm and helped to understand the temporal dependencies of the variables. The fact that the Band Similarity method, which was put forward for the first time in its field, worked successfully and produced results, can be said to be the main contribution of this study to the knowledge.


2021 ◽  
Vol 1058 (1) ◽  
pp. 012066
Author(s):  
Salah L. Zubaidi ◽  
Hussein Al-Bugharbee ◽  
Yousif Raad Muhsin ◽  
Sadik Kamel Gharghan ◽  
Khalid Hashim ◽  
...  

2021 ◽  
Author(s):  
Shunyu Wu ◽  
Pingwei Zhao ◽  
Miaoshun Bai ◽  
Jingcheng Wang ◽  
Yang Lan

Author(s):  
Binaya Kumar Mishra ◽  
Shamik Chakraborty ◽  
Pankaj Kumar ◽  
Chitresh Saraswat

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