February 2011 article: “Water Dispatch Model for Middle Route of a South-to-North Water Transfer Project in China,” by Jian-xia Chang, Yi-min Wang, and Qiang Huang.
This article takes a good look at one of the key water development projects underway to alleviate water shortages in northern China. The Middle Route transfers water from the Danjiangkou reservoir on the Han River, which is a large tributary to the middle reaches of the Yangtze River, to the Henan and Hebei provinces, and ultimately to Beijing and Tianjin, as well as to the western part of the North China Plain.
A model is developed to simulate the joint operating rules of multiple water resources. The simulation results show that joint operation is clearly advantageous compared with performance without the transfer project, and a better water supply situation is achieved.
Just another little water project? “The total length of the main canal is 1,230 km … The first stage diverts 9 to 13 billion cubic meters per year, or 25 to 30% of the Han flows in the Danjiankou reservoir, and the second stage could increase diversions to 20 billion cubic meters per year.” They sure think big over there!
[Please note: I have quoted and paraphrased freely from the article, but the interpretation is my own!]