![]() In order to clarify the controlling mechanism of each factor on the sedimentary system, Beerbower ( 1964) first classified the above factors into two types, including within-basin and extra-basin factors. There are a number of controlling factors that govern the depositional processes and the internal architecture of a sedimentary system including water and sediment supply, climatic changes, base-level variation, tectonic activities, and so on (Gong et al. ![]() Dynamic allocation of accommodation space and the following adaptive sediments filling were the two main driving factors of the autogenic evolution of deltas. The experimental delta consisted of six autogenic depositional successions. The three sedimentary layers formed in the three stages constituted an autogenic succession. In the late aggradational–progradational stage, the feeder channel branched into several radial distributary channels, overlapped distributary channels were formed on the delta plain, and terminal lobe complexes were formed at the end of distributary channels. These distributary splay complexes were retrogradationally overlapped due to the continuous migration of the bifurcation point of the feeder channel. In the middle retrogradational stage, the feeder channel was blocked by the mouth bar(s) which grew out of water at the end of the initial stage, and a set of large-scale distributary splay complexes were formed on the delta plain. In the initial progradational stage, one feeder channel incised into the delta plain, mouth bar(s) was formed in front of the channel mouth, and small-scale crevasse splays were formed on the delta plain. The evolution of river-dominated delta controlled only by autogenic process is obviously periodic, and each autogenic cycle can be divided into an initial progradational stage, a middle retrogratational stage, and a late aggradational–progradational stage. Through the flume tank experiment under constant boundary conditions, the depositional process, evolution principles, and the sedimentary architecture of a river-dominated delta was presented, and a corresponding sedimentary architecture model was constructed. However, autogenic processes are often affected by changing allogenic factors and are difficult to be identified and analyzed from modern and ancient records. To get big solutions to big problems, it turns out you just have to build a giant wave machine to make giant waves.Autogenic processes are widely found in various sedimentary systems and they play an important role in the depositional evolution and corresponding sedimentary architecture. ![]() There are countless applications: tide-proofing off-shore turbines, testing the effects of rising sea levels, and building flood-resistant architecture. ![]() For example, if the experiment is testing out beach erosion, it will create a fake beach and batter it around with waves to test its effect. Inaugurated yesterday in Delft, Netherlands, the waves at the flume will reach 30 feet in height to test out solutions to erosion and flooding.Ī giant plate at one end of the 16 foot-wide pool pushes water down the canal, gradually increasing force until a giant wave crashes on the other side, with whatever is being tested on the other end. At 300 meters, it's one long water trough with a big purpose: to make the highest man-made waves in the world. Deltare built an impressive piece of pure Dutch engineering. It's called the Delta Flume.
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