Study on the Spatio-temporal Differences of Water Pollution in Shandong Province from 2010 to 2017

Water is the source of life. Water is not only the main component of the body, but also many physiological functions. Water resources are the basic resources and basic conditions on which humans depend. This paper uses the data of Shandong Statistical Yearbook (2011-2019) and ArcGIS spatial analysis technology to study the spatial and temporal distribution pattern of water pollution in Shandong Province from the perspective of wastewater. The results show that the wastewater discharge from 2010 to 2017 shows an overall upward and downward trend. In 2015, compared with 2010, the wastewater discharge increased by a net increase of 113.158 million tons, with an average annual increase rate of 5.22%. In 2015, the amount of wastewater discharged was reduced by 50.346 million tons, with an average annual decline rate of 4.58%. From the time distribution characteristics of water pollution in Shandong Province, the wastewater discharge in Weifang, Qingdao, and Jining accounts for 29.20% of the province's wastewater discharge. The water pollution in the central region is more serious, showing a heavy-light pollution distribution. At present, lightly polluted flower arrangement enclaves appear. From the perspective of the spatial distribution characteristics of water pollution in Shandong Province, the gaps between severe water pollution conditions in different cities have gone from increasing to decreasing. The water pollution situation in the province is obvious, the distribution of cold and hot spots is obvious, and Qingdao is a waste water discharge hot spot (Z = 2.24> 2.0), Weihai is a cold spot area for wastewater discharge (z = -1.11 <-1.0).