scholarly journals How Extreme Were The Torrential Floods In Smaller Watersheds In Serbia In September 2014

2021 ◽  
Vol 4 (2) ◽  
pp. 116-124
Author(s):  
Ana Petrovic ◽  
Sanja Manojlovic ◽  
Stanimir Kostadinov
Keyword(s):  
Sediment Transport ◽  
Soil Conservation ◽  
Extreme Event ◽  
Emergency Situation ◽  
Flood Events ◽  
Combined Method ◽  
Small Watersheds ◽  
Local Municipalities ◽  
Local Residents ◽  
Hydrological Extreme

The September torrential floods in 2014 in the Eastern Serbia were a real disaster for local residents in municipalities of Kladovo, Negotin and Majdanpek. Meteorological extreme event caused the hydrological extreme event which led to declaration of the emergency situation in all three municipalities. The combined method of Soil Conservation Service and synthetic unit triangular hydrograph (SCS-SUH) is employed to compute the maximal discharges in small watersheds of Dupljanska reka and Manastiricki potok, in order to assess the extremeness of September 2014 torrential flood events. Since the surface runoff is accompanied by intensive soil erosion on watershed slopes and the maximal discharges by sediment transport in river beds, estimation of mean annual sediment transport is also presented in this work. The September 2014 floods will remain historic given that they took 5 human lives and caused enormous material damage for local municipalities, so presented hydrological analysis should be taken as very important part of flood event documentation along with reports of municipalities’ emergency headquarters.

The Analysis on the Effect of Silt Arrester System Construction in Small Watershed Runoff Sediment and the Evaluation of the Ecological Environment

2012 ◽  
Vol 518-523 ◽  
pp. 4782-4785
Author(s):  
An Li Ma ◽  
Bao Ku Yin
Keyword(s):  
Sediment Transport ◽  
Yellow River ◽  
Monitoring And Evaluation ◽  
Shanxi Province ◽  
Ecological Environment ◽  
The Yellow River ◽  
System Construction ◽  
Small Watershed ◽  
Monitoring Method ◽  
Small Watersheds

The monitoring and evaluation on silt arrester system of small watersheds involves monitoring indicators, data collection, analysis and evaluation etc. The Yellow River Water Conservancy Committee carried out a "small watersheds of the Loess Plateau model project" from 2005 to 2010 in the Yellow River sandy area. The project has 12 small watershed silt arresters, one of which is in Yonghe county of Shanxi province. This article takes the work of sediment transport monitoring in Yonghe silt arrester system as an example and describes the monitoring method, content, and finally analyzes the influence of silt arrester system construction and sediment transport on ecological environment.

Simulation of sediment transport during flood events: laboratory work and field experiments

2001 ◽  
Vol 46 (4) ◽  
pp. 599-610 ◽  
Author(s):  
RENAAT DE SUTTER ◽  
RONNY VERHOEVEN ◽  
ANDREAS KREIN
Keyword(s):  
Sediment Transport ◽  
Field Experiments ◽  
Laboratory Work ◽  
Flood Events

scholarly journals Relationships between Sediment Transport and Various Hydrological and Hydraulic Characteristics of Flood Events on Trotuș River (Romania)

2019 ◽  
Author(s):  
Dan Dumitriu
Keyword(s):  
Sediment Transport ◽  
Hysteresis Loops ◽  
Flood Events ◽  
River Channels ◽  
Stream Power ◽  
Sediment Rating Curve ◽  
Type D ◽  
Highly Sensitive ◽  
Type C ◽  
Major Floods

Sediment transport is highly sensitive to flow conditions, showing significant increase during flood events. Based on this principle, this study set out to rank flood events occurring along river Trotuș (Romania) based on the amount of transported sediment and event duration. The 77 flood events recorded from 2000 to 2017 were ranked into 4 classes: type A (4%); type B (16%), type C (14%) and type D (66%). The sediment transport specific for the 4 types of flood events was related to the flow discharge (sediment rating curve and hysteresis effect), the specific stream power and the energy expenditure of these events. More than 60% of the hysteresis loops typical for flood events were clockwise, thus singling out the channel as the main sediment source. Ca. 74% of the total sediment yield was transported at stream power values higher than the 300 Wm-2 threshold, which was exceeded in less than 1% of the investigated timeframe. The changes occurring in the sediment transport rates after major floods show that these events are significant thresholds in the hydrogeomorphic evolution of river channels.

Soil conservation risk assessment based on land use scenarios in the Nile River Basin

2020 ◽  
Author(s):  
Yanxu Liu ◽  
Hua Liu
Keyword(s):  
Land Use ◽  
Ecosystem Services ◽  
Sediment Transport ◽  
River Basin ◽  
Soil Conservation ◽  
River Sediment ◽  
Nile River ◽  
Natural Growth ◽  
Soil Displacement ◽  
Nile River Basin

<p>Soil conservation is one of the most important ecosystem services, as it has a positive impact on soil fertility and land productivity. Soil conservation has multiple facets, while the current research on soil conservation has rarely considered combining the soil displacement conservation ability and river sediment transport conservation. On the basis of the Revised Universal Soil Loss Equation (RUSLE) and the Sediment Delivery Ratio (SDR) module of Integrated Valuation of Ecosystem Services and Tradeoffs (InVEST), this study developed an indicator, named soil conservation risk, by introducing the soil displacement risk and the river sediment transport risk. The natural growth scenario and reforestation scenario of land use change in the Nile River Basin from 2010 to 2100 were estimated as the input parameters. Three main results were obtained. (1) From 2000 to 2010, the grassland increased by 4.34%, and the forest decreased by 4.91%. (2) From 2000 to 2100, the soil conservation presents a declining tendency in the two scenarios, and the soil conservation amounts based on soil displacement conservation and river sediment transport conservation were 1550.48±177.12 and 100.93±6.24 (t ha<sup>-1</sup> y<sup>-1</sup>) in a natural growth scenario, respectively, and 1576.78±63.21 and 104.41±0.30 (t ha<sup>-1</sup> y<sup>-1</sup>) in a reforestation scenario, respectively. (3) We compared the soil displacement risk and river sediment transport risk, and the reforestation scenario can effectively relieve the soil displacement risk in the first fifty years, while the river sediment transport risk can be relieved from 2010 to 2100. Overall, when reducing the conversion rate of the forest by 0.5 times and increasing the rate of conversion to forest by 0.5 times, the effect of land use changes to the river sediment transport risk has a longer-term effect than do changes to the soil displacement risk.</p>

scholarly journals Setting Up of an Experimental Site for the Continuous Monitoring of Water Discharge, Suspended Sediment Transport and Groundwater Levels in a Mediterranean Basin. Results of One Year of Activity

Water ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 3130
Author(s):  
Stefano Giorgio Pagano ◽  
Donato Sollitto ◽  
Marco Colucci ◽  
Davide Prato ◽  
Fabio Milillo ◽  
...  
Keyword(s):  
Surface Water ◽  
Sediment Transport ◽  
Suspended Sediment ◽  
Continuous Monitoring ◽  
Water Discharge ◽  
Suspended Sediment Transport ◽  
Flood Events ◽  
Experimental Site ◽  
Groundwater Levels ◽  
Set Up

The study of suspended sediment transport requires continuous measurement of water discharge to better understand the sediment dynamics. Furthermore, a groundwater monitoring network can support the stream discharge measures, as it reveals how the interactions between surface water and groundwater may affect runoff and consequently sediment transport during flood events. An experimental site for the continuous monitoring of water discharge, suspended sediment transport and groundwater levels was set up in the Carapellotto basin (27.17 km2), which is located in Apulia, Southern Italy. Seven flood events that occurred in the operation timespan were covered with a full record of both water discharge and sediment concentration. Some monitoring problems, largely due to the clogging of the float by mud, suggested to improve the experimental set up. The results show high values of suspended sediments concentration which indicate the sub-basin’s key role in the sediment delivery to the whole river system, while counter-clockwise hysteresis loops are the most frequent due to the basin characteristics. The effects of the interaction between surface water and groundwater are related not only to the flood magnitude but also to the hydrogeological features in the hyporheic zone.

scholarly journals Impact of Scientific Scrutiny after the 2016 Braunsbach Flash Flood on Flood-Risk Management in the State of Baden-Württemberg, Germany

Water ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 1165 ◽  
Author(s):  
Antje Witting ◽  
Frederik Brandenstein ◽  
Christiane Zarfl ◽  
Ana Lucía
Keyword(s):  
Risk Management ◽  
Sediment Transport ◽  
Flood Risk ◽  
Extreme Event ◽  
Flash Flood ◽  
Morphological Changes ◽  
Group Discussion ◽  
Flood Risk Management ◽  
Informal Assessment ◽  
The Impact

This paper presents interdisciplinary research focusing on the municipality of Braunsbach in the German state of Baden-Württemberg, where, in May 2016, a flash flood attracted media attention and scientific scrutiny that highlighted the fact that certain aspects of flood risk were overlooked during earlier assessments conducted by the municipality, such as sediment transport. Using a network analysis and a focus-group discussion, we traced the flow of knowledge through the reported interactions between governmental, private, and academic actors in the two and a half years after the event. From our analysis, we learned that the extreme event attracted scientists to the formal and informal assessment of the hazard and the associated damages. Most importantly, we found conditions under which scientific scrutiny is not detached from but becomes integrated in a governance setting. While it is through this process that sediment transport has become an integral part of flood-risk management in Baden-Württemberg, with an evident impact on the measures already implemented, the impact of morphological changes, as well as large wood and sediment transport, have not been factored into the risk assessment as of yet. These variations in scientific impact on the assessment can be explained by decision biases that can occur when decision makers are under pressure to tackle vulnerabilities and thus lack the time to deliberate in a way that uses all the available evidence.

Sign in / Sign up

Export Citation Format

Share Document