Do you want to publish a course? Click here

Modeling the monthly flows of AL-SIN Spring in the Syrian Coast by using the time series analysis

نمذجة التدفقات الشهرية لنبع السن في الساحل السوري باستخدام تحليل السلاسل الزمنية

1255   1   51   0.0 ( 0 )
 Publication date 2018
and research's language is العربية
 Created by Shamra Editor




Ask ChatGPT about the research

The study and design of water-intakes on springs is based on the analysis of time series of historical measurements to achieve prediction of incoming water volumes or future expected. The research aims to model the monthly water flows of AL-SIN Spring in Syrian Coast and future expectations of these flows, by adopting the Box-Jenkins models to analyze the time series data, due to its reliable accuracy. Monthly water flows, thus, monthly volumes, for 101 month (from June 2008 to October 2016) were processed. Performing the stability of the time series on variance and median and non-seasonality and making the wanted tests on model residuals, we found that the best model to represent the data is SARIMA(2,0,1) (2,1,0)12 , and after dividing the data into 81 month to build the model and 20 month to test it. Depending on the smallest of weighted mean of criteria RMSE, MAP, MAE,. The best predicted model was SARIMA (3,1,0) (1,1,0)12 and the model gave the nearest predicted values to actually measured data in spring.


Artificial intelligence review:
Research summary
تهدف هذه الدراسة إلى نمذجة التدفقات الشهرية لنبع السن في الساحل السوري باستخدام تحليل السلاسل الزمنية، وذلك من خلال اعتماد نماذج بوكس-جنكنز لتحليل البيانات التاريخية. تم استخدام بيانات تدفقات المياه الشهرية لمدة 101 شهر من يونيو 2008 حتى أكتوبر 2016. بعد إجراء عمليات استقرار السلسلة الزمنية وإزالة الموسمية، تم اختبار عدة نماذج وتبين أن النموذج الأمثل هو SARIMA(2,0,1)(2,1,0)12. تم تقسيم البيانات إلى 81 شهرًا لبناء النموذج و20 شهرًا لاختباره. أظهرت النتائج أن النموذج المقترح يعطي تنبؤات قريبة من القيم الفعلية لتدفقات المياه الشهرية. تم استخدام معايير RMSE وMAP وMAE لتقييم دقة النموذج. الدراسة تبرز أهمية استخدام نماذج بوكس-جنكنز في تحليل البيانات الهيدرولوجية واتخاذ القرارات المتعلقة بإدارة الموارد المائية.
Critical review
دراسة نقدية: تعتبر هذه الدراسة خطوة مهمة في مجال تحليل السلاسل الزمنية لتدفقات المياه، حيث تقدم نموذجًا دقيقًا لتنبؤ التدفقات الشهرية لنبع السن. ومع ذلك، يمكن تحسين الدراسة من خلال استخدام مجموعة أكبر من البيانات لتغطية فترات زمنية أطول، مما قد يزيد من دقة التنبؤات. كما يمكن تعزيز الدراسة بإضافة تحليل للعوامل المناخية والبيئية الأخرى التي قد تؤثر على تدفقات المياه. بالإضافة إلى ذلك، يمكن مقارنة النتائج مع نماذج تنبؤية أخرى للتحقق من فعالية النموذج المستخدم.
Questions related to the research
  1. ما هو الهدف الرئيسي من الدراسة؟

    الهدف الرئيسي هو نمذجة التدفقات الشهرية لنبع السن في الساحل السوري باستخدام تحليل السلاسل الزمنية ونماذج بوكس-جنكنز.

  2. ما هي الفترة الزمنية التي تم تحليلها في الدراسة؟

    تم تحليل بيانات تدفقات المياه الشهرية لمدة 101 شهر من يونيو 2008 حتى أكتوبر 2016.

  3. ما هو النموذج الأمثل الذي تم اختياره في الدراسة؟

    النموذج الأمثل الذي تم اختياره هو SARIMA(2,0,1)(2,1,0)12.

  4. ما هي المعايير المستخدمة لتقييم دقة النموذج؟

    المعايير المستخدمة لتقييم دقة النموذج هي RMSE وMAP وMAE.


References used
Springflow Simulator Manual Vers. 1.0.2, 2007. ACSAD-BGR TECHNICALCOOPERATION PROJECT - NO.: 2004.2032.3, Management, Protection and Sustainable Use of Groundwater and Soil Resources
NELSON, G. R., Applied Time Series Analysis For Managerial Forecasting, Holden- Day, Inc. 1973, 78-91
Box, G. M. P. and PIERCE, D. A., Distribution of Residual Autocorrelation in Autoregressive Integrated Moving Average Time Series Models, John Wiley & Sons. 1970, 115-132
rate research

Read More

The study and design of water dams depend essential on prediction of water volumes or future predicted in rivers, by using the time series analysis of the historical measurements. The research aims to make statistical study of monthly water volume s incoming in AL-Aroos River in Syrian coastal and future prediction of these volumes. And the Box-Jenkins models is adopt to analysis the time series data, because of its high accuracy. We attend the monthly water volumes for 15 years. And after doing the wanted tests on model residuals we found that the best model to represent the data is SARIMA(0,1,2) (1,2,1)12 , and after dividing the data to 14 years to build the model and one year to test it , and depending on the smallest of weighted mean of criteria RMSE, MAP, MAE,. The best predicted model is SARIMA (1,1,0) (0,1,1)12 and the model give the nearest predicted of measured data actually.
AlSin Spring spurts at the foot of coastal mountains and pours in The Mediterranean sea near Arab-Almulk village. Presently, spring water used for drinking, irrigation and industry, while excess water goes to sea. Current research aims to determin e the daily discharge response to daily rainfall, and to set an equation for recession discharge for predicting spring discharge and volumes of flow after definite time from the beginning of spring base flow, which allows to operate and manipulate available water resources through an optimum design of water intake from this spring. Response time of AlSin Spring between (3-5) days for average discrete daily rainfall with high intensity which caused 0.5 ~ 1.0 m3/sec increasing in spring discharge value. Yearly discharge trends to decrease with a rate of 0.0975 m3/sec between 1974 and 2016 years. While the monthly minimum discharges increase about 0.1284 m3/sec, and monthly maximums decrease about 0.0752 m3/sec between 1994 and 2016. We recommend adopting recession curve analysis to predict the optimal discharge of springs within definite periods.
This study aimed to analyze the status of shares related to the banking sector in Amman Stock Exchange, through the use of time series analysis, relying on the achievement of the following objectives: 1- Analysis of the status of shares related to the banking sector in Amman Stock Exchange, through the use of time series analysis. 2- Access to an efficient market through the application of the conditions existing in the market. 3- Analysis of the status of the general trend of stock prices in Amman Stock Exchange, through the turnover rate of shares over twelve months for eight years starting from 2000-2007 in order to find the variables affecting performance. 4- Identifying the most important components of the time series affecting stock prices in Amman Stock Exchange (seasonal, periodical, and random), in addition to identifying which of these components are responsible for stock price changes. 5- Trying to determine the general tendency of the time series of stock prices for the coming period through the use of the model of basic components. This study was based on three major hypotheses. The study sample consisted of the banks listed in Amman Stock Exchange with a total of 17 banks. Furthermore, Microsoft Office Excel had been used to analyze the data of turnover rate of shares in Amman Stock Exchange to reach conclusions. The study came to a number of conclusions such as: • Results showed that the influence of irregular variables on the turnover rate of shares related to the banking sector, listed in Amman Stock Exchange, was clear, in addition to the impact of changes related to the general trend as well as the seasonal and periodical changes. • Results showed that the size of circulation plays a major role in changing the direction of prices. Thus, in the case of higher prices, increased circulation is desired, while decreased circulation will be the case for low prices. Based on the above conclusions, the researcher presented a series of suitable recommendations for the use of analysis model of time series in analyzing the status of shares in Amman Stock Exchange.
حظيت نمذجة وتوقع السلاسل الزمنية بأهمية كبيرة في العديد من المجالات التطبيقية كالتنبؤ بالطقس وأسعار العملات ومعدلات استهلاك الوقود والكهرباء، إن توقع السلاسل الزمنية من شأنه أن يزود المنظمات والشركات بالمعلومات الضرورية لاتخاذ القرارات الهامة، وبسبب أهمية هذا المجال من الناحية التطبيقية فإن الكثير من الأعمال البحثية التي جرت ضمنه خلال السنوات الماضية، إضافةً إلى العدد الكبير من النماذج والخوارزميات التي تم اقتراحها في أدب البحث العلمي والتي كان هدفها تحسين كل من الدقة والكفاءة في نمذجة وتوقع السلاسل الزمنية.
The research area is located in the Syrian coast between the Sin and Rous river. This research aims at studying the hydrogeological characteristics of the unconfined aquifer in the research area and evaluating the conditions of its placed. The rese arch was based on a monitoring network consisting of 36 wells that penetrate the unconfined aquifer, and measurements continued during the period (October 2016 until September 2017). The unconfined groundwater depths in the research area range between 0.5-11.5 m, and sometimes during the drought period reach to 13.5 m, while it is close to the surface in the winter and up to 0.1m in some wells. The electrical conductivity ranges between 550-3700 μs/cm, increasing as we go west and reaching 9,000 μs/cm and more in the wells near the sea during the dry period. Groundwater levels Lower in the dry period to below sea level in near-shore wells, achieves the hydrodynamic conditions of the seawater intrusion.
comments
Fetching comments Fetching comments
Sign in to be able to follow your search criteria
mircosoft-partner

هل ترغب بارسال اشعارات عن اخر التحديثات في شمرا-اكاديميا