摘要：With the continuous development of social economy and industry, more and more attention has been paid to the concept of ecological and environ-mental protection in scenic spots. Water quality has a great influence on tourism activities in lake scenic spots.In order to study the impact of water pollution on tourism activities in scenic spots, in this paper, single factor pollution index method and Nemeiro index method are used to evaluate the water quality of lake scenic spots. In addition, the water pollution levels ofthetwo methods are compared.Through the water quality evaluation methods, the water quality of a lake from 2000 to 2019 was analyzed. Five pol-lution factors including potassium permanganate in-dex, ammonia nitrogen, total phosphorus, biochemi-cal oxygen demand and total nitrogen were selected as evaluation factors. Through analysis,it is con-cluded that the comprehensive index of lake water pollution first increased and then decreased.In 2005, the comprehensive index of water quality pollution reached the maximum value of4.56,and after 2015, the comprehensive index of water pollution fell be-low 1. The water quality evaluation grade has also been reduced from Grade IV in 2005 to Grade I in 2015, thus the water quality has improved signifi-cantly. The number of tourists and total tourism rev-enue in this lake scenic spot in the past 20 years has shown a trendof first decreasing and then increasing. The number of tourists and total tourism revenue dropped to the lowest point of 5.28 million, 9.8 bil-lion yuan in 2005,and gradually increased to 70 mil-lion,73.2billion yuan in 2019.Through comparative analysis, it is found that water pollution has greatly affected tourism activities. The improvement oflake water quality is positively correlated with the num-ber of tourists and total tourism revenue.
