Results 21 to 30 of about 2,641,272 (265)
Nonlinear dynamics of sand banks and sand waves [PDF]
, 2000 Sand banks and sand waves are two types of sand structures that are commonly observed on an off-shore sea bed. We describe the formation of these features using the equations of the fluid motion coupled with the mass conservation law for the sediment ...
Newell, Alan C., Komarova, Natalia L.
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Perceptions of Masalembu Island Communites on Importance and Threat Values of Small Island Resources
Jurnal Antropologi: Isu-Isu Sosial Budaya, 2021 Small islands have the nature of remoteness and vulnerability and commonly occupied by multi-ethnic communities that cause differences in the way they perceive natural resources.
Ihsannudin Ihsannudin +4 more
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地质科技通报, 2022 With the rapid development of economy, there is a huge demand for sand and gravel, and the development of marine sand has become a current hot spot. The east exit of Qiongzhou Strait is rich in marine sand resources, and its resource potential is in the ...
Maogang Qin +6 more
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MEASUREMENT OF FLOATING SAND PARTICLE CONCENTRATION AND ESTIMATE OF THE FLUX IN SEA SAND MINING AREA
Doboku Gakkai Ronbunshu, 2004 鉛直混合が盛んな瀬戸部では, 強流により海底から巻き上げられた浮遊砂が, 潮流により隣接した海域内に運搬され沈降する. この浮遊砂濃度を超音波ドップラー流速プロファイラー (ADCP) の音響強度から求めた後方散乱強度 (Sv) のにより推定し, さらに浮遊砂フラックス量について検討した. 調査は海砂の採取により砂堆が消滅した三原瀬戸海域で実施した. 初めにADCP計測と同時に, 採水により浮遊物質量 (SS) を測定した結果, ADCPのSvとSSとの関係には, 高い相関が認められた. 次にSv値からSS濃度に換算し, 往復流のみにより輸送されるSSフラックスを計算した. この結果, 三原瀬戸海域においてSSフラックスの収支は流入を示した.
Eisuke HASHIMOTO +2 more
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IOP Conference Series: Earth and Environmental Science, 2021 The dilemma between development interest, economical gain and preserving the marine environment from the implication of sea sand mining activity has been primarily discussed in the last decade. In essence, the sea sand mining which jeopardizes the marine environment occurs due to sand dredging activity which contributes to abrasion, removal of corals ...
Maskun, - +4 more
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Regeneration of sand waves after dredging [PDF]
, 2002 Sand waves are large bed waves on the seabed, being a few metres high and lying hundreds of metres apart. In some cases, these sand waves occur in navigation channels.
Knaapen, M.A.F., Hulscher, S.J.M.H.
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Performance Evaluation of Concrete Using Recycled Coarse Aggregate and Sea Sand as Sustainable Alternatives [PDF]
E3S Web of ConferencesWith growing environmental concerns over the depletion of natural resources and the adverse impact of excessive sand mining, there is an increasing demand for sustainable alternatives in concrete production.
Chidambaram Prithiviraj, D Kalaimani
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IOP Conference Series: Earth and Environmental Science, 2021 Abstract Carrier material (mixture of viscous fluid and fine particles, CM) circulation system was proposed to lift up deep sea mineral resources. This study focuses on appropriate mixing proportions of CM for lifting up heavier and coarser ores.
K Orita, K Tani, A Suzuki, T Kosho
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Grain size dependency in the occurrence of sand waves [PDF]
, 2006 Sandy shallow seas, like the North Sea, are very dynamic. Several morphological features are present on the bed, from small ripples to sand waves and large tidal sandbanks.
Knaapen, M.A.F. +5 more
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Journal of Marine Science and Engineering, 2022 A large part of the Baltic Sea coastline in the north-eastern provinces of Germany (Mecklenburg-Vorpommern and Schleswig-Holstein) is protected by coastal protection dunes, which are constructed and maintained to preserve a quasi-natural beach ...
Christian Kaehler +3 more
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