Research On The Influence Of Urban Heat Island On Ecological Water Consumption Of Urban Green Space

With the development of the global urbanization,more and more people and the industry are quickly gathered in the city.The urban problems become more and more prominent,especially urban environmental problems,such as haze,urban water pollution,urban heat island.To improve the quality of urban people and the urban living environment,the urban environment is urgent to improve.This paper mainly studies the following aspects: The correlation between urbanization and regional climate factors in Mianyang in recent decades was discussed by using the method of correlation analysis;the different underlying surface on the heat island mitigation effects of Mianyang was discussed by using comparative method;Mianyang green space was calculated by mathematical model PM formula Ecological water consumption,and the sensitivity coefficient of temperature to green water consumption was analyzed by sensitivity coefficient model;By studying the sensitivity of the temperature to the ecological water consumption of the green space as the breakthrough point,it reflects the influence of the heat island on the green space.That is helpful to improve the ecological environment of Mianyang and to guide the planning of small and medium-sized cities in northwest Sichuan.1The conclusions of this paper are as follows:1?Through the significance level of 0.05 significant test,this study find that urbanization rate and temperature correlation is highly signifcant,With the increase in urbanization rate,regional temperatures will rise.The regression equation was P = 15.226 + 4.8 * X(P was the temperature and X was the urbanization rate).The regression equation was obtained by SPSS.2?In the spring of 2016,the average heat island intensity of Mianyang city is 1 ?.The average heat island intensity in summer,autumn and winter is0.8 ?,0.6 ? and 0.6 ? respectively.The heat island intensity of Mianyang is 0.7 ?.3?In the study of the thermal environment of different underlying surfaces,it is found that the difference between the hard pavement and the green space in the spring and winter is very small.The summer and autumn greens are better than the hard pavement,and the hard pavement in summer is 0.45 ?,The hardpavement in autumn is 0.13 ?,it is higher than the green observation temperature,and it is found that the thermal performance of the green space is better than that of the hard pavement,which is more conducive to alleviating the heat island effect;In the comparison of the temperature of the riparian zone and the urban area,the temperature of the riparian zone is 0.38 ? lower than that in the urban area,and the temperature in the coastal area is lower than that in the urban area,with an average of 0.2 ? lower than that in the urban area.The average temperature is lower than the urban area,the average temperature is lower than the urban area,the average temperature is lower than 0.03 ?,the temperature difference is very small;The temperatures in the costal area are lower than urban areas,with an average low of 0.6 ?.the largest wind is a natural ventilation corridor.In general,the natural river due to its unique environment,especially in the summer and winter season,the temperature is lower,so it can be a good way to alleviate the city heat island environment.Protecting them is very meaningful.In the analysis of the heat island intensity and humidity,wind speed and temperature in the urban area of Mianyang,the heat island intensity and humidity are directly related,and their correlation is the most significant.4 ? 2016 ecological water consumption calculated as 862 mm,Mianyang urban green ecological water consumption values show a unimodal distribution trend.From the beginning of the observation,the ecological water consumption of urban green space gradually increased,the spring average was 3.48mm·d-1,and it reached the maximum in summer,with an average value of 4 mm·d-1S;Since then,The average value of ecological water consumption in Mianyang green area in autumn is 1.8 mm·d-1?0.47 mm·d-1.5?In 2016,the temperature sensitivity coefficient of Mianyang urban area was between 0.23 and 0.9,with an average value of 0.41.Under the influence of heat island,the average water consumption of Mianyang urban area increased by0.3mm.In the spring season,the water consumption of Mianyang green space increased by 0.5mm.The water consumption of Mianyang green space increased by 0.3mm in the summer.The water consumption of Mianyang green space increased by 0.2mm in the autumn;The water consumption increased by0.3mm in winter.It is also found that the ecological water consumption in thecoastal area of the spring is 0.1mm less than that of the urban area In the comparison between the ecological water consumption and the ecological water consumption in the urban area.The ecological water consumption in the coastal area in the summer is less than that in the urban area 0.24 mm.The ecological water consumption in the autumn and the ecological water consumption of the urban area is very small,which can be counted as 0mm.The ecological water consumption in the winter rivers is 0.3mm less than the urban ecological water consumption.