Working of the capacity down pipe (1, empty; 2, filling-up; 3, over-flowing; 4; full; 5, drained)
A case study in Manchester with different solutions for water infiltration and retention systems, showed that soak-aways and infiltration trenches are generally less preferred than capacity down pipes, ponds and filter strips.
And this wateringpipe – the capacity downpipe (CDP) – works even better.
Chinese sanitation workers in Shanghai fish out thousands of dead pigs found floating in the Huangpu (March 2013)
China has not only problems solving their air pollution. Poor water quality is also of serious concern.
Therefore the Minister of Environmental Protection announced a trillion-yuan plan to reduce water pollution in a country where a fifth of the rivers are consider to be toxic, and two fifths of poor or very poor quality. Read More