荃灣中坑明渠將工業區和住宅區分隔開。由於靠近人口稠密的地區，該渠往往成為傾倒垃圾和污水的地方，造成嚴重的環境和市容問題。The Chung Hang Nullah separated the industrial and residential zones in Tsuen Wan. Being close to densely populated area, this open nullah was often used for the dumping of rubbish and sewage causing great environmental and aesthetic problems.