River engineering

About: River engineering is a research topic. Over the lifetime, 435 publications have been published within this topic receiving 10286 citations. The topic is also known as: Channelisation.

Harmonization of the engineering and environmental objectives of the river management: Case study of the Južna Morava river

Abstract: Harmonization of river engineering objectives and environmental aspects of river management is considered in the case study of Južna Morava river. Investigation of morphological, hydraulic and sediment logical characteristics of the river, flora and vegetation were carried out in this study. During the field investigation, the assessment of riparian vegetation was made and large number of species were determined. More than 100 species are classified into 7 communities. Regarding the existing problems of the bank erosion, excavation in the floodplain and bad ecological conditions of the riparian zone, the new environmentally friendly approach is proposed. The technical measures consist of a special excavation in the floodplain on the inside bank of the river bends, with significant effect on the erosion intensity on the outside bank. Two ecological alternatives of management of floodplain are considered - the plantation of poplar in the deepened zone of the floodplain and the wetland formation in this zone.

A first calibration of the one-dimensional model of the Nhat Le River basin

Abstract: This thesis provides a first draft of a one-dimensional model of the Nhat Le River Basin. The model is almost ready for use due to the short period of time. The model requires at least an adequate calibration before using. With this thesis a first start has been made. Eventually, with the model, the probability of water levels in the Nhat Le River (Quang Binh Province, Vietnam) can be estimated, which are needed for calculation of the embankments height along the Nhat Le River. In the beginning of the project this thesis had another research question. But at the start of the assignment the provided documents did not suffice due to missing and/or wrong drawings, wrong calculations and lack on key input. Some information should be bought and the newly presented documents never came or came too late. Although it didn’t work out as planned, a lot about the Vietnamese culture and organizational structure has been learned. The new research question was originated around the calculations of the newly proposed embankments along the Nhat Le River. The provided documents calculated the levels of the embankments with the old regulations. These calculations were based on the old Vietnamese regulations, which are not sufficient anymore. The new regulations require a one-dimensional model to estimate the highest water level in the river with different frequency floods. Due to the short period of time, the model is not yet ready for implementation. However some recommendations for optimization and further use of the model are given. The one-dimensional model is made with the computer software HEC-RAS. The Water Resources University Hanoi provided the required data, including boundary conditions and cross-sections. Data in Vietnam is not easy to obtain. It took a long time to get the proper information and support from different parties. Although, this assignment is a good first start of modelling the one-dimensional model. In order to establish the final one-dimensional model the following steps should be conducted: - More cross-sections along the Dia Giang and Kien Giang river branches in order to determine the correct slopes of the river branches; - Development of the Dia Giang and Kien Giang river branches with wider cross-sections, including floodplains and storage areas; - Calibration of the Dia Giang river branch; - Calibration of the whole Nhat Le river Branch; - Implementation of the My Trung sluice in the Kien Giang river branch; - Data of different frequency floods in the Dia Giang and Kien Giang river branch to estimate the different high water levels in the main of Nhat Le river in different scenarios; - Clearness about the positions of the newly constructed embankments.

River engineering, from the past to the future (Evaluation of approaches and outlooks)

Abstract: یط رد هک دنتسه یمهم یحطس یبآ عبانم هلمج زا اه هناخدور یگتسباو زا یشان هجوت نیا .دنا هدوب هجوت دروم هراومه رشب یگدنز لیبق زا یتاعوضوم رد یگتسباو نیا هب نداد خساپ و بآ هب ناسنا .تسا یبآ لقن و لمح و اه بلایس راهم ،بآ لاقتنا ،یزرواشک نوچمه یساسا تامادقا هک تشاد دوجو رواب نیا هتشذگ رد طوبرم اهنت ،اه بلایس ربارب رد تظافح و اه هناخدور زا یرادرب هرهب ی هزوح رد تامادقا نیا تقیقح رد یلو ،تسا هناخدور یسدنهم هب یزورما یانعم رد .تسا هتشاد رارق اه هناخدور یهدناماس و ایحا و هدرکن زواجت لاس 50-60 زا هناخدور نیسدنهم تیلاعف ی هقباس هتخانش ام روشک رد بآ نارمع یسدنهم دیدج اًتبسن یاه هتشر زا هتشادرب هناخدور یسدنهم هب یملع کت شرگن نیا یتسیاب .دوش یم تاعلاطا رب هولاع دیاب تقیقح رد ملع نیا ناصصختم اریز ،دوش ،تسیز طیحم ،یسانش نیمز ،یکیژولوردیه یاه ییاناوت ،یکیلوردیه یصخشم یلمع ی هبرجت یاراد ،یسانشراک ثحابم هب دورو زا شیپ توافتم رگید ی هناخدور اب هناخدور ره طیارش هکنآ تلع هب ،دنشاب ی هبرجت و یملع ی هدهاشم کی جیاتن ناوت یمن هاگچیه و هدوب هبرجت هب قیقحت نیا رد .داد میمعت یرگید هب ار هناخدور کی یلمع ی هنیمز رد )USACE( اکیرمآ نارمع ی هرادا نمجنا یاه هیصوت و یارب نمجنا نیا یاهداهنشیپ و هدنیآ رد هناخدور نیسدنهم تیبرت .تسا هدش دانتسا هزوح نیا نیصصختم ءاقترا

A Study on the Restoration of the Flood Restraining Forest Belts

Abstract: The Ministry of Construction has already undertaken a policy, including the Comprehensive Flood Control Measures initiated in 1977 to prevent overflow by promoting penetration of rain into soil and building temporary rain reservoirs. Another example is the 1987 Overflow Control Measures, which sets forth measures to be taken when a flood runs over levees. And, the Flood Restraining Forest Belt to make the overflowing current run gently is proposed as a priority policy in 1996. These recently proposed measures confirm that the present situation warrants the revival of the Edo philosophy and approach of accepting a certain level of overflowing. With advanced technology available, floods would occur far less frequently than in the old days anyway. Nevertheless, the new approach and the Edo approach share the same acceptance that floods are sometimes inevitable.One feasible way to implement the above policy would be to adaptively apply the flood restraining forest belt popularized in the Edo Era. Fortunately, we already have large levees; flood control would be complete if these belts were laid covering the levees.Considerable attention has been paid to the semi-natural river engineering method and the multi-natural river engineering method. In this respect, the flood restraining forest belt may be the ultimate semi-natural river engineering method as it provides a corridor of a biotope connecting the forest and the sea, making the river more natural, and improving the riverside scenery. It is strongly recommended all the remaining forest belts be conserved and efforts be made to restore them where they have been lost.

The River Katun, Its Channel Morphology and Changes Due to River Engineering and Alluvium Extraction

Abstract: The paper discusses the main features of the transformation of the semi-mountainous channel of the River Katun (Altai region) on the basis of long-term studies. A mobile braided channel in its lowermost reaches was trained to improve navigation conditions and large scale sand and gravel excavation operated over a long period of time. The resulting incision of the channel has caused a significant change to its morphological pattern.