Ecological permeable dam, and its design and construction method

Abstract

The invention discloses an ecological filter dam and the design and construction methods thereof. And it is located in a non-flood carrying riverway, and its section is in a ladderlike double structure and the side-slope coefficient of its slope is 1/1-1/2.5, and it comprises four parts of: (A) control layer; (B) transition layer; (C) overflowing layer; and (D) steady layer. And its design flow: firstly surveying landform conditions of damming address and inquiring hydrometeorological data or other design data and obtaining the geometric parameters and design flow, substituting these parameters into the dupine formula in the seepage mechanics and calculating reasonable seepage coefficient and stay time, then making further design and selecting proper graded gravels, damming materials and plants. And it has the following remarkable advantages of: operating without power, reducing construction cost, having very good pertinency, able to obtain COD removal rate of about 10%, TN removal rate of 10%-20%, and TP removal rate of 20-40%.

Description

1. Technical field [0001] The invention relates to a non-point source pollution control technology used in rural river network areas, more specifically an ecological permeable dam and its design and construction method. 2. Background technology [0002] In recent years, with the rapid development of my country's economy and the gradual improvement of people's living standards, water bodies in rural areas are facing more and more serious threats of non-point source pollution, such as the Taihu Lake Basin, Chaohu Lake Basin and Dianchi Lake Basin. Non-point source pollution is generally composed of agricultural surface runoff and rural domestic sewage, including the loss of nutrients such as nitrogen and phosphorus in farmland, and the random stacking and discharge of rural domestic garbage, livestock and poultry manure, domestic sewage, and aquaculture wastewater. The discharge of these non-point source pollution basically has no rules to follow, and is generally difficult to...

AI Technical Summary

Problems solved by technology

When applying the above non-point source pollution control technology, there will be some problems: ①The purification efficiency of the plant or microbial purification system is relatively low, and it occupies a large area when removing the same amount of nutrients; ②Due to the occurrence of non-point source pollution Irregularities of these purification systems often require a specific collection system and power boost to ensure the operation of the system, which increases investment costs and also leads to relatively low shock load resistance of the system

Relevant document retrieval shows, before this patent application date, do not find the document of the ecological permeable dam with similar structure and related design and construction method of the present invention

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