Method for calculating storage capacity of reservoir

Abstract

The invention discloses a method for calculating storage capacity of a reservoir, which belongs to the field of reservoir operation. The storage capacity of a traditional reservoir is obtained by taking the water level of a dam as a reservoir representative water level and calculating the capacity curve interpolation of the water level. In the method, a reservoir surface is a horizontal plane which takes the water level of the dam as a datum mark and neglects a backwater phenomenon at the tail end of the upper stream at a reservoir area as well as additional gradient influence along the upper stream and the lower stream of the reservoir. For a reservoir of a long narrow riverway type, the length-width ratio of the reservoir is very large, the additional gradient of the upper stream and the lower stream at the reservoir area is also large and the backwater phenomenon is obvious at the tail end of the upper stream, so that the storage capacity of the reservoiro, which is btained by calculating the interpolation according to a traditional method, has larger error and seriously affects the calculation accuracy of reservoir operation. By utilizing a dynamic water surface curve method, the invention carries out integral calculation on the basis of actually measured dynamic water surface curve materials collected at the reservoir area, and the integral calculation comprises three links: unit division calculation, telemetering water-level collection and segmented superposition calculation, wherein the unit division calculation is a core processing link, the telemetering water-level collection is a data reorganization and outfit link and the segmented superposition calculation is a result calculation link.

Description

technical field [0001] The invention belongs to the field of reservoir dispatching, in particular to a method for measuring and calculating the water storage capacity of a reservoir based on the measured dynamic water surface line. Background technique [0002] In the field of reservoir dispatching, the storage capacity of the reservoir is the basis of all dispatching calculations. At present, the water level in front of the dam is used as the representative water level of the reservoir at home and abroad, and it is obtained by interpolation on the static storage capacity curve of the water level. [0003] The interpolation of the water level static storage capacity curve is mainly based on two assumptions: one is that the water surface of the reservoir is considered to be the water level in front of the dam as the reference point; That is, the water level static storage capacity curve. For general lake-type reservoirs, this method can basically meet the accuracy requiremen...

AI Technical Summary

Problems solved by technology

For general lake-type reservoirs, this method can basically meet the accuracy requirements, but for narrow and long river-type reservoirs, the deviation is relatively large, which often leads to unreasonable phenomena, such as drastic changes in reservoir water storage in a short period of time, The inflow flow obtained from the water balance calculation shows a sawtooth fluctuation, the inflow flow or outflow flow is negative, etc.

[0004] The reason: For narrow and long channel reservoirs, there are different degrees of backwater phenomenon at the end of the reservoir. At the same time, due to the large ratio of length to width, there is a certain additional gradient in the upstream and downstream of the reservoir area under the influence of the river flow velocity. Contradicts the aforementioned reservoir level assumption

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