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Method for biological carbon improvement farmland drainage canal lowering intensive agricultural region non-point source pollution
A method for a biological carbon improvement farmland drainage canal lowering intensive agricultural region non-point source pollution includes the seven steps that firstly, a trapezoidal drainage canal is dug beside intensive agricultural region farmland, a bottom groove is formed in the bottom of the canal in a digging mode, and a seeping drainage cage wrapped in a biological carbon layer is arranged in the bottom groove; an adjustable drainage opening and the seeping drainage cage are connected, and a connecting gap is filled with matter; the seeping drainage cage is covered with fine sand, and a sand filtering layer is formed and tamped; geotextile is laid on the sand filtering layer and covered with biological carbon improvement soil, then, a double-layer flow blocking weir in which biological carbon filter materials are contained and a hole penetrating filter pipe are arranged at assigned positions in the bottom groove of the drainage canal, and the remaining space of the bottom groove is filled with biological carbon and tamped; finally, buffer pebbles are arranged on the inlet of the canal and at the water outlet position of the opening of the weir, and the complete improved drainage canal is formed. Through the method, the control effect of the farmland drainage canal on intensive agricultural region non-point source pollution can be effectively improved, and meanwhile, pollution to underground water caused by farmland runoff infiltration can be prevented.
Method for biological carbon improvement farmland drainage canal lowering intensive agricultural region non-point source pollution
A method for a biological carbon improvement farmland drainage canal lowering intensive agricultural region non-point source pollution includes the seven steps that firstly, a trapezoidal drainage canal is dug beside intensive agricultural region farmland, a bottom groove is formed in the bottom of the canal in a digging mode, and a seeping drainage cage wrapped in a biological carbon layer is arranged in the bottom groove; an adjustable drainage opening and the seeping drainage cage are connected, and a connecting gap is filled with matter; the seeping drainage cage is covered with fine sand, and a sand filtering layer is formed and tamped; geotextile is laid on the sand filtering layer and covered with biological carbon improvement soil, then, a double-layer flow blocking weir in which biological carbon filter materials are contained and a hole penetrating filter pipe are arranged at assigned positions in the bottom groove of the drainage canal, and the remaining space of the bottom groove is filled with biological carbon and tamped; finally, buffer pebbles are arranged on the inlet of the canal and at the water outlet position of the opening of the weir, and the complete improved drainage canal is formed. Through the method, the control effect of the farmland drainage canal on intensive agricultural region non-point source pollution can be effectively improved, and meanwhile, pollution to underground water caused by farmland runoff infiltration can be prevented.
Method for biological carbon improvement farmland drainage canal lowering intensive agricultural region non-point source pollution
OUYANG WEI (author) / WEI PENG (author) / HUANG WEIJIA (author) / WANG XUELEI (author) / SHI YANDAN (author)
2015-05-13
Patent
Electronic Resource
English
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