Bed-load silt sampler and use method thereof

Abstract

The invention provides a bed-load silt sampler and a use method thereof. The bed-load silt sampler comprises a fixed frame, baffle plates, a sampling frame and a sampling box, wherein the fixed framecomprises inserting rods and fixed rods; the two adjacent inserting rods are connected by the fixed rods; the surfaces of the inserting rods, which are opposite to the surfaces of the other two adjacent inserting rods, are respectively provided with a sliding groove; four baffle plates are arranged and are connected with the two adjacent inserting rods by the sliding grooves; the sampling frame comprises a placing box, connecting plates and a connecting rod; the connecting plates are arranged at the two sides of the placing box, and are connected by the connecting rod; the sampling box is arranged in the placing box; the upper surfaces of the sampling box and the placing box are consistent in height. The bed-load silt sampler and the use method provided by the invention have the beneficialeffects that by matching use of the fixed frame, the sampling frame and the sampling box, the positions of dug pits are firstly fixed by the fixed frame, then the sampling box is placed in the fixedframe, the periphery of the fixed frame is respectively provided with the baffle plate when the sampling box is placed or lifted, and the sampling box is almost not contacted with a river bed, so thatthe error caused by the disturbance action in the process of collecting bed-load samples in the traditional sampler is avoided.

Description

technical field [0001] The invention relates to the field of displacement mass sampling, in particular to a displacement mass sediment sampler and a use method thereof. Background technique [0002] Pushing load, also known as bed sand load, bottom load, pushing load, and traction load, refers to the sediment particles that roll, move, jump or move in layers along the river bottom in the water flow. Frequent exchanges are carried out. The rate of sediment transport is very important for river geological research. Now the general method of calculating the rate of sediment transport is to use various calculation formulas. This is only a theoretical calculation, and scientific calculation is rigorous. Therefore, There are also many ways to calculate the sediment transport rate of the moving mass by sampling a river or other water-bath bottom unit time, the amount of sand transported per unit area, and calculating the sediment transport rate of the transport mass by the amount o...

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Problems solved by technology

[0002] Pushing load, also known as bed sand load, bottom load, pushing load, and traction load, refers to the sediment particles that roll, move, jump or move in layers along the river bottom in the water flow. Frequent exchanges are carried out. The rate of sediment transport is very important for river geological research. Now the general method of calculating the rate of sediment transport is to use various calculation formulas. This is only a theoretical calculation, and scientific calculation is rigorous. Therefore, There are also many ways to calculate the sediment transport rate of the moving mass by sampling a river or other water-bath bottom unit time, the amount of sand transported per unit area, and calculating the sediment transport rate of the transport mass by the amount of sand transported in this sample. The moving mass sampler has a simple structure, is a kind of net, and is fixed on the bottom of the water. After waiting for a certain period of time, the net-shaped sampler is retracted, and the amount of drifting sand in the sampler is calculated, but there is a drifting sediment sampler. It is impossible to avoid the artificial disturbance error in the process of mass collection, and on the one hand, due to the disturbance generated during the placement of the sampler and the extraction process, the collected samples are often higher than the actual sand content of the mass; on the other hand , the net loan at the tail of the traditional sampler has a resistance effect on the water flow, and the measured value is to a certain extent smaller than the real sediment concentration

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