scholarly journals Effect of plan layout on the sediment control efficiency of slit-check dams for stony type debris flows mitigation

2015 ◽  
Author(s):  
M. Silva ◽  
S. Costa ◽  
A. H. Cardoso
Keyword(s):  
Debris Flows ◽  
Sediment Control ◽  
Control Efficiency ◽  
Check Dams

scholarly journals Effectiveness and efficiency of slot-check dam system on debris flow control

2015 ◽  
Vol 3 (9) ◽  
pp. 5777-5804 ◽  
Author(s):  
Y. H. Zou ◽  
X. Q. Chen
Keyword(s):  
Debris Flow ◽  
Flow Control ◽  
River Basin ◽  
Debris Flows ◽  
Check Dam ◽  
Sediment Control ◽  
Sediment Volume ◽  
Check Dams ◽  
Effectiveness And Efficiency ◽  
Set Up

Abstract. Slot-check dam system is commonly used to control sediment transport associated with debris flows and mitigate debris flow hazards. This paper aims to estimate the performance of the slot-check dam system in the field and set up a verification to evaluate the efficiency of a slot-check dam system and each subsystem in debris flow sediment control. Field survey on a group of a series of slot-check dams at Shengou Basin in Yunnan, China reveals that the conserving sediment volume of each dam is related to its relative location in the group, gradually decreasing from upstream to downstream. The cumulative sediment volume within a subsystem of slot-check dams closely related to the characteristics of the catchment controlled by the subsystem. It increases with the controlled catchment area of the most downstream dam in subsystem and the distance from the dam to the upstream most. Evaluation models for the conserving efficiency of a slot-check dam system on debris flow control in a river basin and each subsystem within the group associate to the controlled catchment characteristics have been proposed. The layout principle of a slot-check dam system in a river basin has been developed based on the conserving efficiency of a subsystem of slot-check dams which would allow the slot-check dam system to be designed in a more scientific way.

Check dams and sediment control: final results of a case study in the upper Corneja River (Central Spain)

2018 ◽  
Vol 19 (1) ◽  
pp. 451-466 ◽  
Author(s):  
Virginia Díaz-Gutiérrez ◽  
Jorge Mongil-Manso ◽  
Joaquín Navarro-Hevia ◽  
Iván Ramos-Díez
Keyword(s):  
Central Spain ◽  
Sediment Control ◽  
Check Dams

Alternative approach for works controlling stony debris flows

2020 ◽  
Author(s):  
Carlo Gregoretti ◽  
Matteo Barbini ◽  
Martino Bernard ◽  
Mauro Boreggio
Keyword(s):  
Debris Flow ◽  
Debris Flows ◽  
High Elevation ◽  
Valley Bottom ◽  
Check Dams ◽  
Retention Basin ◽  
Retention Basins ◽  
Solid Liquid ◽  
The Impact ◽  
The Village

<p>Many sites of the Dolomites are threatened by channelized debris flows: solid-liquid surges initiated by the entrainment of large quantities of sediments into the abundant runoff at the head of channel incised on fans, can dramatically increase their volume along the downstream routing. This is the case of the Rovina di Cancia site where solid-liquid surges forming in the upper part of the basin can increase their volume up and over 50000 m<sup>3</sup>, seriously impacting the downstream village of Borca di Cadore. The debris-flow channel ends just upstream the village that in the past was hit by four debris flows (three in the recent years) that caused victims and destructions. Control works built until now are not sufficient to protect the village from high magnitude debris flows and a definitive solution calls to be planned. Present works are a flat deposition area, 300 m downstream the initiation area, an open dam under construction downstream it, and  two retention basins at the end of the channel. Between the open dam and the upstream retention basin, there are the rest of eight check-dams made of gabions, built in the 60s and progressively damaged or destroyed by the debris flows occurred after their construction. This series of check-dams limited the entrainment of solid material and the occurrence of localized scours. The initial plan is the substitution of the check-dams with concrete structures and the widening of the dowsntream retention basin through the raising of high elevation embankment downstream it and the following demolition of the actual dyke. Finally, a channel crossing the village and national route on the valley bottom will deliver the fluid phase from the widened basin to the Boite river. All these control works have a very high cost for construction and maintenance and severely impact the village with the presence of a non-negligible residual risk. These drawbacks call for an alternative solution that is searched looking at to the morphology. Downstream of the open dam and on its right side, there is a deep impluvium that ends on a large grass sloping area. The novel solution requires the construction of a channel through the right high bank that deviates the debris flow into the impluvium. The impluvium, widened through the excavation of the surrounding slopes, is closed at the outlet by  an open dam. Downstream the open dam, a channel will lead to a retention basin, where most of storage volume is obtained from the excavation of the grass sloping area, limiting the elevation of the dykes At the end of this basin an open dam will deliver the debris-flow fluid part to a channel passing under the national route and joining the Boite river. Such a solution composed of a deviatory channel, two retention basins (the deep impluvium and that excavated on the sloping grass area) and the channels between and downstream them, has quite a lower costs of construction and maintenance, eliminating the impact on the village because occupying uninhabited areas without interrupting the main roads.</p>

Assessing, mapping, and optimizing the locations of sediment control check dams construction

2020 ◽  
Vol 739 ◽  
pp. 139954 ◽  
Author(s):  
Hamid Reza Pourghasemi ◽  
Saleh Yousefi ◽  
Nitheshnirmal Sadhasivam ◽  
Saeedeh Eskandari
Keyword(s):  
Sediment Control ◽  
Check Dams

scholarly journals A New Method to Evaluate the Combined Performance of Check Dams and Afforestation on Debris Flows Mitigation in a Dry-hot Valley

2021 ◽  
Author(s):  
Liqun Lyu ◽  
Mengzhen Xu ◽  
Guanyu Zhou ◽  
Zhaoyin Wang
Keyword(s):  
Debris Flow ◽  
Debris Flows ◽  
Yunnan Province ◽  
New Method ◽  
Energy Conditions ◽  
Vegetation Coverage ◽  
Economic Losses ◽  
Flow Volume ◽  
Jiangjia Gully ◽  
Check Dams

Abstract Debris flows in waterways can transport large amounts of sediment downstream, which can cause serious damage and economic losses. The vegetation cover in the valley of the Xiaojiang River in Yunnan Province, China—classified as a dry-hot valley—was significantly reduced by logging in the 1950s. Soil erosion intensified and 107 gullies developed, which led to debris flows along the 86 km length of the river. Jiangjia Gully is a tributary of the Xiaojiang River. Historically, debris flows have occurred frequently, blocking the Xiaojiang River seven times between 1957 and 2000. Since 2000, the construction of check dams and afforestation have decreased the volume of debris flows in the three tributaries of Jiangjia Gully. However, different combinations of check dams and afforestation were adopted in the three tributaries of Jiangjia Gully, which has led to the different trends in debris flows behaviour. A new method was established to evaluate the mitigative effect of check dams and afforestation on debris flows. We found that the debris flow volume was proportional to the gravity energy of soil and rock on the gully bank and inversely proportional to the vegetation coverage in a dry-hot valley setting. The method revealed that under different gravity energy conditions, the implementation order of check dam construction and afforestation is important for debris flow mitigation.

The effect of check dams on the dynamic and bed entrainment processes of debris flows

Landslides ◽  
2019 ◽  
Vol 16 (11) ◽  
pp. 2201-2217 ◽  
Author(s):  
Wei Shen ◽  
Dongpo Wang ◽  
Huanan Qu ◽  
Tonglu Li
Keyword(s):  
Debris Flows ◽  
Check Dams ◽  
Bed Entrainment

Using Numerical Model to Analyze Reduction of Debris Flows by the Installation Location of Check Dams

2017 ◽  
Vol 13 (4) ◽  
pp. 117-128
Author(s):  
Won Jun Tak ◽  
◽  
Kye Won Jun ◽  
Byung Sik Kim ◽  
Yong Ho Yoon ◽  
...  
Keyword(s):  
Numerical Model ◽  
Debris Flows ◽  
Check Dams

scholarly journals Impacts of Filled Check Dams with Different Deployment Strategies on the Flood and Sediment Transport Processes in a Loess Plateau Catchment

Water ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 1319 ◽  
Author(s):  
Honglei Tang ◽  
Hailong Pan ◽  
Qihua Ran
Keyword(s):  
Sediment Transport ◽  
Loess Plateau ◽  
Transport Model ◽  
Transport Processes ◽  
Peak Time ◽  
Engineering Structures ◽  
Sediment Control ◽  
Flood Peak ◽  
Check Dams ◽  
Channel Reduction

As one of the most widespread engineering structures for conserving water and soil, check dams have significantly modified the local landform and hydrologic responses. However, the influences of sedimentary lands caused by filled up check dams on the runoff and sediment transport processes were seldom studied. Employing an integrated hydrologic-response and sediment transport model, this study investigated the influences of filled check dams with different deployment strategies in a Loess Plateau catchment. Six hypothetical deployment strategies of check dams were compared with no-dam scenario and the reality scenario. Results showed that filled check dams were still able to reduce Flood peak (Qp) by 31% to 93% under different deployment strategies. Considerable delays of peak time and decreases were also found in scenarios, which were characterized as having larger and more connective sedimentary lands on the main channel. Reduction rates of Sediment yield (SY) and the total mass of Eroded sediment (ES) ranged from 4% to 52% and 2% to 16%, respectively, indicating that proper distributions of check dams can promote sediment deposition in the channel and reduce soil erosion. The results of this study indicate that (1) check dam systems could still be useful in flood attenuation and sediment control even when they were filled, and (2) optimizing the deployment strategies of check dams can help reduce erosion.

scholarly journals How memory effects, check dams, and channel geometry control erosion and deposition by debris flows

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
T. de Haas ◽  
W. Nijland ◽  
S. M. de Jong ◽  
B. W. McArdell
Keyword(s):  
Debris Flows ◽  
Memory Effects ◽  
Erosion And Deposition ◽  
Channel Geometry ◽  
Check Dams ◽  
Control Erosion
Sign in / Sign up

Export Citation Format

Share Document