Study On The Distributing And Changing Law Of Aeroanion In Qipan Mountain Scenic Spot

The aeroanion is a kind of very important resource of forest recreation.It has the functionof decreasing dust level and restraining bacteria from growing, the effect of adjustingmicroclimate and keeping health is also obvious.Its concentration has already become animportant index of evaluating the air condition and environment about the city.This text viewsthe central area of qipan mountain scenic spot as studying object,through the observing on theaeroanion concentration in the studying area,we find that the aeroanion concentration hasseveral distributing characteristic and varying law below:In different standing forest types, the aeroanion concentration of pinus tabulaeformis ismaximum, the shrubwood's is minimum. The average aeroanion concentration of coniferoustrees is 868/cm~3, while the average concentration of broad-leaf trees is 726/cm~3, coniferoustrees is higher than broad-leaf trees;the concentration of forest land is higher than the areawithout forest; the compound community structure such as arbor-shrub-grass-water andarbor-shrub-grass are better among different community structures,their concentration aretwice more than single lawn.There are two obvious peak value in the daily variability of aeroanion concentration, itappears at 8:00 AM and 0:00 in midnight, the lowest value appears at 16:00 PM;the CI valueundulates obviously, it is highest at 8:00 AM and 22:00 in the evening and lowest at 17:00PM.The aeroanion concentration and air quality grade both increases with the rising of height atlow height area(100m～220m); the aeroanion concentration in shady-side slope is higher thansunny-side slope.From the result which was observing in different weather conditions of five places in thescenic spot, the aeroanion concentration is the highest after rainning, while there is no obviousdifference in sunny day and cloudy day, the concentration in sunny day is slightly higher thancloudy day.The CI value increasing a lot after rainning. From the regression analysis betweenaeroanion concentration and temperature and humidity, we can see that, there is a negativerelation between the aeroanion concentration and temperature during the extent of 17℃～30℃,while to the humidity, a positive relation exists during the extent of 60%～496%.Moving water's concentration is 2032/cm~3, static water's is 924/cm~3,the aeroanionconcentration of moving water is obviously higher than static water; the concentration of largearea water is higher than small ones; the aeroanion concentration around fountain is highestamong all water body types, fountain's effect on concentration is the furtherest too. The aeroanion concentration and CI value of qipan mountain scenic spot are higher thanother function areas in the city, it plays an important role in improving the ecologicalenvironment of the suburb even to the whole city.