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Register a new userRainfall – Runoff Relationship in ALHWAIZ Basin
العلاقة بين الهطل المطري و الجريان في حوض الحويز
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تعتمد تدفقات الأنهار على كميات الهطل المطري في أحواضها الساكبة، حيث يرتبط التدفق بكمية الهطل ارتباطاً وثيقاً، كما يتعلق التدفق بعوامل مناخية و جغرافية عديدة. و تتمتع العلاقة بين الهطل و الجريان بأهمية كبيرة في تقدير التدفقات و تغيّراتها في حوض الحويز الواقع بين حوضي الزرود و الجيلاني، و يشكل حوض الحويز جزءاً من حوض نهر السخابة. شيد سد الحويز على نهر الحويز بطاقة تخزينية بلغت 16.5 مليون متر مكعب. تهدف الدراسة إلى إيجاد علاقة تربط بين قيم الهطل المطري و الجريان النهري في حوض الحويز. حيث اعتمد البحث على التحليل الإحصائي لبيانات الهطل و الجريان، إضافةً إلى الدراسة التحليلية لبيانات الهطل المطري السنوي ((1959-2011 مما يساعد في معرفة نزعة الهطولات المطرية و تغيراتها في المستقبل، و التنبؤ بتغيرات تدفقات نهر الحويز. و بيّنت الدراسة أن قيم عامل الجريان تراوحت بين (0.007-0.66). و تم التوصل إلى معادلة رياضية تتيح تقدير كمية التدفق اعتماداً على قيم الهطل المقيسة أو المتوقعة، و استيفاء البيانات المفقودة أو الناقصة بمستوى أداء جيد.
River flows depend on precipitation in their catchments, where the flow is highly correlated with precipitation, among many climatic and geographic factors. The relationship between precipitation and runoff is of great importance in estimating flow changes in The HWAIZ basin that is located between The-Zrod and The-Gelani basins. The Al-HWAIZ Dam was built on the HWAIZ River with storage capacity of 16.5 MCM. The purpose of this study is to find a relationship between rainfall and runoff in The HWAIZ basin. This study depended on statistical analysis of rainfall and runoff data, and the analytical study of the annual rainfall data (1959-2011), to guess the trend of rainfall and its future changes and forecasting changes in the HWAIZ river flows. The study showed that the runoff coefficient values ranged between (0.007-0.66). A mathematical relationship was established that allows to estimate flow based on measured or predicted precipitation values, as well as appraise missing or lacking data with accepted level of accuracy.
References used
LAHLABAT, L. O. Rainfall-Runoff Analysis of Wadis Contributing to the Dead Sea: Wadi Og as a Case Study. An-Najah National University, Nablus, Palestine 2013, 208
SHHADI ABEDELKAREEM, S. GIS-Based Hydrological Modeling of Semiarid Catchments (The Case of Faria Catchment). An-Najah National University, Nablus, Palestine 2005, 201
CHOWDHURY, A; AHMMED, S; CHOWDHURY, M. Trends of Climatic Variables (Rainfall and Temperature) at Sylhet, Bangladesh. SUST Journal of Science and Technology, VOL.19. NO.5, 2012, 87-93
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The Alsafarqieh watershed is located on the western slopes of the coastal mountain range,
Its area is 132.58 km2, It forms a part of the Alros river basin, The river starts at a height of
1200 m, A group of tributaries meet and form the Alros River
, which flows into the
Mediterranean Sea. Salaheddin Dam was constructed to store 10 MCM on the riverbed at
the intersection of the Qurdaha River with the Shehada River. The study aims to determine
the rainfall- runoff relationship in The Alsafarqieh watershed. The solution depends on the
statistical analysis of precipitation and runoff data. Then the study found the mean annual
precipitation is 159.6 MCM/year, and the mean annual flow into the Salaheddin lake was
9.4 MCM during the study period (2010-2012), so the runoff coefficient is 0.06. This
indicates a significant water loss. A mathematical equation to predict the runoff quantities
depending on the values of precipitation, has been concluded. This is important to study
water projects for water storage and flood prevention.
The studied area forms a part of the coastal basin on the east coast of the
Mediterranean Sea located north of Tartous city.The area is bordered by the Mediterranean
Sea from the west. And (jobar,banias, albasia) rivers from north, al Housen river
from the
south. The area covers about (358) km2.
The research aims to find arelationship between rainfall and flow within Mrqiyeh
River Basin, by conducting analytical statistical study using Minitab software, which helps
in completing the measurements are not available, and to predict the river flows depending
on the expected precipitation in the river basin. The study found that the relationship is:Q =
216 + 0.0379 P - 36.8ln (P) + 3.46ln(Q) ,and rainfall reflect 87.2% of the changes that
occur to the flow of the river. The study recommended that need to intensify the river
discharges measurements in order to increase the reliability of their data.
The importance of this study lies in the hydrological analysis of the
relationship between the drainage system and the precipitation. The
problem of the study reveals in the water incompetence in the basin
which get to 336 million m3 and will gets
to 600 million m3 with
probability (p = 50%) and associated with missing the accurate evaluation
of the water resources.
The study aims to evaluate the water resources in the basin, to create a
mathematical model for calculation of the run off and its relationship with
the precipitation, and to predict the water resources for the hydrological
year according to many probabilities and the complementary
management for water resources.
Stages of the study involve the following:
1- Determining of the active stations in the feeding of hydrometric
stations.
2- Observing the average of water resources quantity (precipitation) over
the basin that reached 9764 million m3 and range between 2,26millionm3 in the hydrometric station of AL- Hamidi and 112,42
million m3 in Hama station.
3- Observing the average of the run off in the basin reached 744,67542
million m3.
4- Observing the run off system in the basin is a snow-rain system, where
the average of maximum discharge associates with precipitation and the
minor discharge associates with deprivation of the precipitation.
5- Creating a mathematical model for calculation of the run off and its
relationship with the precipitation.
6- Predicting the water resources for the hydrological year according to
many probabilities.
7- Creating a water strategy for the basin according to the data of water
predication in many probabilities
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one with high permeability spread. However, on the coastal plateau deposits with moderate to low permeability values spread, and water levels quickly respond to rainfall and irrigation water, which makes it get easily polluted and affected by climatic factors. Analyses and discussions of field data have led to the fact that subterranean-water levels are to do with many natural and artificial interrelated parameters. And in some cases, they can be adversely oriented, and difficult to isolate and monitor separately, and become very difficult to derive mathematical formula for describing the relationship between just two parameters (subterranean-water percentages and rainfall levels)
This research aims at finding the model of rainfall carnal slope
in Kastal Mouaf-Coastal basin . Statistical analysis has been
performed during 48 year ( 1961-2009) using spss v.22 to
represent the relationship between the rainfall and the factors
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