Assessment to the sediment concentration affected by river water current during dry and monsoon seasons at Kanor village-Bengawan Solo River

Maulana, Mahendra Andiek; Soemitro, Ria Asih Aryani; Mukunoki, Toshifumi

doi:10.3208/jgssp.ina-02

Cited by 3 publications

(3 citation statements)

References 7 publications

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“…The impact of a higher river discharge is presumed to be larger because of the high sediment influx and high erosion potential [13,14]. From Fig.…”

Section: Effect Of River Branches On Sediment Transport Ratementioning

confidence: 99%

The Influence of Sembayat Weir on Sediment Transport Rate in the Estuary of Bengawan Solo River, Indonesia

Patriadi¹

2021

GEOMATE

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This research is aimed to assess the sediment transport rate under different conditions of estuary geometry by comparing the situations before and after the construction of Sembayat Weir. Sediment concentration, flow velocity, and temperature were obtained via field investigation from October 2016 to September 2017. River discharge and tidal discharge phenomenon are analyzed in the estuary, which affect hydraulic head changes. The HEC-RAS model was used for numerical modelling simulation of the hydrodynamics. The results revealed that the sediment transport rate increased under the influence of erosion in the river branches. BH2 and BH3 were the observation sites located before and after the tributary junction. Those location present the sediment transport rates decreased by 30% and 26%, respectively, in the rainy season because after weir construction. The results agree with previous research results in that sediments were deposited around the estuary weir. Meanwhile, in the river branches, a higher sediment transport rate was observed because of the tidal current that provided sediment transport over a longer term in the dry season. The findings extend the knowledge on the influence of Sembayat Weir on sediment transport rate characteristics with respect to seasonal changes.

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“…The impact of a higher river discharge is presumed to be larger because of the high sediment influx and high erosion potential [13,14]. From Fig.…”

Section: Effect Of River Branches On Sediment Transport Ratementioning

confidence: 99%

The Influence of Sembayat Weir on Sediment Transport Rate in the Estuary of Bengawan Solo River, Indonesia

Patriadi¹

2021

GEOMATE

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“…They concluded that sediment load concentrations near the water surface were lower than those at lower levels in the water column, and thus that the sediment load concentration is affected by water depth. Similarly, Maulana et al (2016) considered the difference in the sediment concentration being affected by river water current during the dry and monsoon seasons. They found that there is a linear correlation between sediment concentration and current velocity.…”

Section: Sedimentation In River Channelmentioning

confidence: 99%

“…In Figure 5, it can be seen that the dry unit weight of the sediment increases as the cross-section gets wider and the flow velocity gets lower. Wider sectional area denotes the condition where sediment concentration is high (Maulana et al, 2016;Soemitro et al, 2015). When the sediment concentration is high and the flow velocity is low, conditions favour sediment deposition.…”

Section: Relation Between Properties Of the Sediment And Sampling Locmentioning

confidence: 99%

Sediment consolidation in ephemeral river: the effect of applied loading on soil properties and dredging method selection

Soemitro

Adriati

Warnana

et al. 2020

International Journal of River Basin Management

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Bengawan Solo River, a typical large ephemeral river in Indonesia, is facing stream problems induced by the erosion and deposition of sediment. Imbalance between these two phenomena on the riverbed can lead to excessive sedimentation, increased risk of flooding, and formation of sandbars. One proposed solution to address this problem is dredging. However, this process can have potential negative effects on the environment, such as removal or destruction of the biota in the dredged materials, increased turbidity, as well as coverage of the benthos in the vicinity. Also, different dredging methods are needed to suit sediments with different properties. Therefore, the knowledge of the deposited sediment properties is required so that appropriate methods can be selected. The sediment characteristics were obtained by performing laboratory tests on physical and consolidation properties and shear strength tests of a soil sample. The results indicate that the materials were broadly grouped into sandy sediment in downstream areas and clayey sediment in estuary areas. The distribution of sediment properties varies with depth because of subsequent erosion and deposition over time. Additionally, the distribution also shows that sand content decreases as the origin of sample approaches estuary areas. Erosion is predominant at locations with small hydraulic radius and high flow velocity, mostly at downstream areas, whereas deposition is predominant at locations with a large hydraulic radius and low flow velocity, specifically at estuary areas. The shear strength increases as the loads imposed by the self-weight of sediment layer increase. The analysis suggests that sediments cannot be eroded naturally as they have a shear strength that exceeds the small-capacity dredging method (t. 20 kPa); therefore, the removal of excess sediment in such areas requires dredging methods of larger capacities (such as grab dredger).

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Suspended Sediment Concentration Assessment as a Precursor to River Channel Shifting in the Bengawan Solo River, Indonesia

et al. 2018

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This study attempts to recognize the fundamental issues in river morphology by examining suspended sediment concentration (SSC) and flow velocity at the curved channel in an alluvial river. To capture the entire set of the afore mentioned conditions, a field investigation was conducted at the inner and outer banks of the flow path of a curved channel, which is considered as the critical section in river change development. The field observations were conducted over a 1-year period, from January to December 2014, in which both dry and rainy seasons occurred. Because the curved channel is subject to severe erosion, especially around the outer bank, lateral migration of the channel might regularly occur. The field investigation showed that the outer side of the curved section migrated approximately 0.0625 m/month during the study period. The SSC, which peaked at 25% and 43% of the maximal flow velocity in the upstream and downstream sections, respectively, showed the rapid erosion of the curved section leading to lateral channel shifting. A channel resistance evaluation confirmed the potential capability of the riverbed material at the curved section was 20% lower than that in the upstream and downstream sections. According to the SSC and flow features, a new understanding of changing river morphology with respect to a curved channel of the Bengawan Solo River was developed.

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Assessment to the sediment concentration affected by river water current during dry and monsoon seasons at Kanor village-Bengawan Solo River

Cited by 3 publications

References 7 publications

The Influence of Sembayat Weir on Sediment Transport Rate in the Estuary of Bengawan Solo River, Indonesia

The Influence of Sembayat Weir on Sediment Transport Rate in the Estuary of Bengawan Solo River, Indonesia

Sediment consolidation in ephemeral river: the effect of applied loading on soil properties and dredging method selection

Suspended Sediment Concentration Assessment as a Precursor to River Channel Shifting in the Bengawan Solo River, Indonesia

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