Laboratory researchers provide key long-term data for operators

Although he repeats routine inspections on water quality for hours each day, Zhang Lei said he never gets bored.

For him, the pioneering research could be an important statistical source to guarantee safety when water diverted from Danjiangkou Reservoir arrives in Beijing.

In May 2011, the Beijing Waterworks Group, a major water supplier in the capital, set up a laboratory near Danjiangkou Reservoir, the source area of the central route of the South-to-North Water Diversion Project, to collect data on water quality, variations in seasons and other records.