上水村鐵路旁的露天污水渠，專為石湖墟及上水村排污水到梧桐河而建。The sewage channel at the side of the railway in Sheung Shui Tsuen. This nullah is built to serve the drainage of sewage in Shek Wu Hui and Sheung Shui Tsuen and drained into the Ng Tung River.