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Water quality of the Nansi Lake drainage area has caused great concern due to the construction of the China's South-to-North Water Transfer Project. In order to investigate the effects of the “treating”, “using” and “protecting” comprehensive management measures and strategies of the Nansi Lake drainage area, accumulating complete and precious water quality data before water transfer and carrying out the Nansi Lake water quality spatial distribution monitoring work are imperative. Using grid distribution method, remote sensing image covers technology and GPS satellite positioning system, meanwhile also combining the local survey of lake area covering type, we determined two sets of monitoring point locations of the in-lake area and the estuarine into the lake, then set up the monitoring plan as: the hydrology monitoring elements such as water depth and flow rate of estuary; 11 water quality monitoring objects as water temperature, pH, CODCr, NH3-N, T-P, T-N, CODMn, transparency, conductivity, SS and chlorophyll-a; 9 sediment monitoring objects including organic matter, total nitrogen, total phosphorus, Cr, Cu, Pb, As, Cd and Hg; as well as the methods of sample collection, storage, transportation and data analysis. This Nansi Lake water quality spatial distribution plan has been revised and improved for four times since first setting up and well explains the factors need to be considered in lakes water quality spatial distribution monitoring work. It provides a set of good technical solutions for other similar lakes’ water quality spatial distribution monitoring planning

A Monitoring Project Planning Technique of the Water Quality Spatial Distribution in Nansi Lake