scholarly journals Effect of Tail Regulators on Euphrates River Flood Capacity at Al Nassiriyah City

2019 ◽  
Vol 26 (1) ◽  
pp. 43-54
Author(s):  
Atheer Ghazi Shayea ◽  
Hayder A. Al Thamiry
Keyword(s):  
Discharge Capacity ◽  
Return Period ◽  
River System ◽  
Hydraulic Structures ◽  
Euphrates River ◽  
Flood Discharge ◽  
Maximum Discharge ◽  
River Flood ◽  
River Training ◽  
The Impact

Euphrates River extends about 125 km within the study area located in Annassiriyah City, Dhi Qar Governorate, Iraq. The impact of the seven hydraulic structures on the discharge capacity of the Euphrates River needs to be considered. The main objectives of this research are to increase the discharge capacity of Euphrates River within Annassiriyah City during flood seasons and study the impact of these hydraulic structures on the river capacity by using HEC-RAS 5.0.3 software. Five scenarios were simulated to study the different current condition of Euphrates River within Annassiriyah City. Other additional four scenarios were implemented through river training to increase the river capacity to 1300 m³/s; it is the flood of 100 year return period. The results of the current condition showed that the maximum discharge capacity of Euphrates River within Annassiriyah City is just 300 m³/s. The results of applied improvements show that the capacity can reach 1300 m³/s when Al Chibayish Weir was hypothetically removed from the river system. Additionally, the river capacity will be reduced to 600 m³/s when Al Chibayish Weir is considered. It was concluded that the 100-year flood discharge cannot be achieved without removing Al Chibayish Weir from the river system.

scholarly journals Evaluation of Dimensions and Drainage Performance Office in the Aceh Tamiang Area Kuala Simpang

2021 ◽  
Vol 3 (1) ◽  
pp. 20-32
Author(s):  
Kamaluddin Lubis
Keyword(s):  
Channel Capacity ◽  
Discharge Capacity ◽  
Return Period ◽  
Rainfall Intensity ◽  
Drainage Channel ◽  
Flood Discharge ◽  
Discharge Plan ◽  
Runoff Discharge ◽  
High Degree

The Aceh Tamiang office area is one of the office areas in Kuala Simpang which consists of various offices in the Aceh Tamiang area. The purpose of this research is to identify the drainage condition of the existing primary drainage channel which accommodates runoff discharge, the shape and direction of the flow in the inundation channel in the Aceh Tamiang Kuala Simpang office area, which is expected to help solve the problem of flooding in the 832 m3 / second. And for the channel capacity in this primary drainage drainage of 0.829 m3 / sec, the value is smaller than the planned flood discharge (Qr). Rainfall intensity (I) of 126,432 mm / hour. The plan flood discharge (Qr) for a 5-year return period yields 2,551 m3 / second and the value for channel discharge capacity (Qs) is obtained from the calculation of 2,216 m3 / second. This value is smaller than the value of the planned flood discharge.area. From the results of research conducted by the Aceh Tamiang Kuala Simpang office area is a location with a fairly high degree of rainfall, with a rainfall intensity (I) of 126,432 mm / hour and a flood discharge plan for a 5-year return period obtained a result of 0.

PERHITUNGAN DEBIT BANJIR SUNGAI CIPINANG DAN SUNGAI SUNTER PADA BERBAGAI PERIODE ULANG

2020 ◽  
Vol 2 (3) ◽  
pp. 219-228
Author(s):  
Ema Khoirunisa Ovilia ◽  
Eri Primadianti ◽  
Denny Yatmadi
Keyword(s):  
Return Period ◽  
Secondary Data ◽  
Hydraulic Analysis ◽  
Flood Discharge ◽  
River Flood ◽  
Calculation Results ◽  
Data Yield ◽  
Yield Calculation ◽  
Existing Data

ABSTRACTIn the area around the Cipinang and Sunter Rivers, floods often occured due to runoff from overflowing rivers. The data and information used in this study are secondary data from related agencies, namely the Balai Besar Wilayah Sungai Ciliwung-Cisadane and BMKG. Hydrological and hydraulic analysis from existing data yield calculation results the maximum flood discharge for the Sunter River for a 2-year return period is 114.035 m³ / s and for a 100-year return period of 407.589 m3 / s and for the Cipinang River, the discharge for the 2-year return period is 113.214 m3 / s while for the 100 yearly repetition of 405,083 m3 / sec.Keywords : Cipinang River, Sunter River, Flood Flow.ABSTRAKPada daerah di sekitar Sungai Cipinang dan Sungai Sunter seringkali terjadi banjir akibat limpasan air dari sungai yang meluap. Data dan informasi yang digunakan dalam penelitian ini merupakan data sekunder yang berasal dari instansi terkait yaitu Balai Besar Wilayah Sungai Ciliwung-Cisadane dan BMKG. Metode pengolahan data menggunakan analisa hidrologi dan analisa hidrolika. Dari hasil perhitungan, didapatkan debit banjir maksimum untuk Sungai Sunter periode ulang 2 tahunan sebesar 114,035 m³/det dan untuk periode ulang 100 tahunan sebesar 407,589 m3/det dan untuk Sungai Cipinang didapatkan debit pada periode ulang 2 tahunan sebesar 113,214 m3/det sedangkan untuk periode ulang 100 tahunan sebesar 405,083 m3/det.Kata kunci : Sungai Cipinang, Sungai Sunter, Debit Banjir.

scholarly journals prediction Capacity of Euphrates River at Assamawa City

2020 ◽  
Vol 26 (4) ◽  
pp. 111-122
Author(s):  
Hussein Shanan. A. AL-Zaidy ◽  
Hayder Abdulameer. K. AL- Thamiry
Keyword(s):  
Decision Maker ◽  
Discharge Capacity ◽  
Cross Sections ◽  
Return Periods ◽  
Euphrates River ◽  
Real Condition ◽  
The Real ◽  
Flood Season ◽  
Maximum Discharge ◽  
The City

The reduction in the rivers capacity is one the most important issue to give the decision maker an idea during the flood season. The study area included the rivers of the Al Atshan, Al Sabeel and Euphrates, which are surveyed with a length of 21, 5 and 20 km respectively. The Euphrates , the Atshan and Al Sabeel rivers were simulated by using HEC-RAS 5.0.3 software to study the real condition within the city of Assamawa. As well as the simulation was implemented by modifying the cross sections of the Euphrates and Al Sabeel rivers to increase their capacity to 1300 and 1200 m3/s respectively which are a flood discharges100 year return periods. The results showed that the maximum discharge capacity under real conditions of Euphrates River is 750 m³/s and both Al Atshan and Al Sabeel arms  are 500 m3/s.

scholarly journals Hydromorphological evaluation of the river training impact on a multi-thread river system (Belá River, Carpathians, Slovakia)

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Anna Kidová ◽  
Artur Radecki-Pawlik ◽  
Miloš Rusnák ◽  
Karol Plesiński
Keyword(s):  
Flow Velocity ◽  
River System ◽  
River Management ◽  
Flood Management ◽  
Temporal Variations ◽  
Velocity Shear ◽  
Management Intervention ◽  
Extreme Flood ◽  
River Training ◽  
The Impact

AbstractThe paper evaluates the impact of river training works designed to address problems associated with flooding on the braided-wandering Belá River in Slovakian Carpathians. This impact was investigated after the flood event in July 2018 on 11 river reaches where the river engineering and management intervention was applied. We analyzed its impact by spatio-temporal variations in river morphology (12 channel parameters) and changes in cross-section and hydraulic parameters (flow velocity, shear stress, stream power, W/D ratio) between pre- and post-flood management periods. The research hypotheses related to decreasing geodiversity in managed river reaches, a rapid increase in flow velocity during an extreme flood in river reaches where there is no sufficient floodplain inundation due to artificially high banks built by river training works, and increasing erosive force in the channel zone thanks to river management intervention were confirmed. The intervention in the braidplain area of the Belá River resulted in an undesirable simplification of the river pattern, loss of geomorphic diversity, loss of channel–floodplain connectivity, and disturbance and restraint of hydromorphological continuity. Identification of main conflicts of the Belá River management is important for clarifying the different approaches of stakeholders in the study area and aims to provide an objective illustration of their consequences. The presented analyses could help in future management issues as well as in the more critical decision-making process in vulnerable and rare braided river systems on the present when we are losing so many natural rivers by human decisions.

scholarly journals Analysis of Ciliwung river flood debit and city flood anticipation using floods early detection system (FEDS)

2022 ◽  
Vol 955 (1) ◽  
pp. 012011
Author(s):  
A W Biantoro ◽  
S I Wahyudi ◽  
M F Niam ◽  
A G Mahardika
Keyword(s):  
Early Detection ◽  
Water Level ◽  
River Water ◽  
Return Period ◽  
Early Warning ◽  
Research Method ◽  
Detection System ◽  
Prototype Tool ◽  
Flood Discharge ◽  
River Flood

Abstract This research is based on flood conditions that often occur in lowland areas such as Jakarta and Semarang. The problem faced is that the notification and early detection of floods is often late, done manually so that it cannot be anticipated by areas downstream of the river. Therefore, it is very important to be able to develop an IoT-based early warning tool so that floods can be detected early in a fast, real time, and immediately anticipated in the upstream area of the river. This research method uses design methods and experiments carried out in the field and laboratory. This research will present a prototype of the FEDS (Floods Early Detection System), based on the Blynk application. The results showed that the calculation of planned flood discharge with a return period of 2, 5, 10, 25 and 50 years can provide an overview of the ability of an area to face the maximum possible rainfall. The FEDS prototype tool, with the Blynk application, can work well using a microcontroller, ultra sonic sensor, and a rainfall sensor. This system is suitable for use in the community to determine rain conditions and water level conditions used at river water level conditions, for early notification of floods.

The impact of socioeconomic system on the river system in a heavily disturbed basin

2019 ◽  
Vol 660 ◽  
pp. 851-864 ◽  
Author(s):  
Zengliang Luo ◽  
Qiting Zuo ◽  
Quanxi Shao ◽  
Xiangyi Ding
Keyword(s):  
River System ◽  
Socioeconomic System ◽  
The Impact

scholarly journals Green–blue water in the city: quantification of impact of source control versus end-of-pipe solutions on sewer and river floods

2014 ◽  
Vol 70 (11) ◽  
pp. 1825-1837 ◽  
Author(s):  
K. De Vleeschauwer ◽  
J. Weustenraad ◽  
C. Nolf ◽  
V. Wolfs ◽  
B. De Meulder ◽  
...  
Keyword(s):  
Adaptation Strategies ◽  
Green Water ◽  
Source Control ◽  
Strong Reduction ◽  
Water Integration ◽  
River Flood ◽  
River Floods ◽  
The Impact ◽  
The City ◽  
Stormwater Retention

Urbanization and climate change trends put strong pressures on urban water systems. Temporal variations in rainfall, runoff and water availability increase, and need to be compensated for by innovative adaptation strategies. One of these is stormwater retention and infiltration in open and/or green spaces in the city (blue–green water integration). This study evaluated the efficiency of three adaptation strategies for the city of Turnhout in Belgium, namely source control as a result of blue–green water integration, retention basins located downstream of the stormwater sewers, and end-of-pipe solutions based on river flood control reservoirs. The efficiency of these options is quantified by the reduction in sewer and river flood frequencies and volumes, and sewer overflow volumes. This is done by means of long-term simulations (100-year rainfall simulations) using an integrated conceptual sewer–river model calibrated to full hydrodynamic sewer and river models. Results show that combining open, green zones in the city with stormwater retention and infiltration for only 1% of the total city runoff area would lead to a 30 to 50% reduction in sewer flood volumes for return periods in the range 10–100 years. This is due to the additional surface storage and infiltration and consequent reduction in urban runoff. However, the impact of this source control option on downstream river floods is limited. Stormwater retention downstream of the sewer system gives a strong reduction in peak discharges to the receiving river. However due to the difference in response time between the sewer and river systems, this does not lead to a strong reduction in river flood frequency. The paper shows the importance of improving the interface between urban design and water management, and between sewer and river flood management.

scholarly journals Evaluating and Predicting the Effects of Land Use Changes on Hydrology in Wami River Basin, Tanzania

Hydrology ◽  
2020 ◽  
Vol 7 (1) ◽  
pp. 17 ◽  
Author(s):  
Sekela Twisa ◽  
Shija Kazumba ◽  
Mathew Kurian ◽  
Manfred F. Buchroithner
Keyword(s):  
Land Use ◽  
Water Resources ◽  
Assessment Tool ◽  
Swat Model ◽  
Land Use Changes ◽  
Management Strategies ◽  
River System ◽  
Least Squares Regression ◽  
Natural Forests ◽  
The Impact

Understanding the variation in the hydrological response of a basin associated with land use changes is essential for developing management strategies for water resources. The impact of hydrological changes caused by expected land use changes may be severe for the Wami river system, given its role as a crucial area for water, providing food and livelihoods. The objective of this study is to examine the influence of land use changes on various elements of the hydrological processes of the basin. Hybrid classification, which includes unsupervised and supervised classification techniques, is used to process the images (2000 and 2016), while CA–Markov chain analysis is used to forecast and simulate the 2032 land use state. In the current study, a combined approach—including a Soil and Water Assessment Tool (SWAT) model and Partial Least Squares Regression (PLSR)—is used to explore the influences of individual land use classes on fluctuations in the hydrological components. From the study, it is evident that land use has changed across the basin since 2000 (which is expected to continue in 2032), as well as that the hydrological effects caused by land use changes were observed. It has been found that the major land use changes that affected hydrology components in the basin were expansion of cultivation land, built-up area and grassland, and decline in natural forests and woodland during the study period. These findings provide baseline information for decision-makers and stakeholders concerning land and water resources for better planning and management decisions in the basin resources’ use.

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