| Land is the basic guarantee for human survival which is important for our daily production and our life,and it is also necessary resource for all human activities and development.Land is composite system which can provide a living place for human beings,but human beings tend to ignore their own ecological functions in the process of use,we're just focusing on his production function.Land ecological function is particularly important in the whole ecosystem.Today,when humans who protect land ecosystems is equivalent to maintain our environment for long survival.But the value of services is directly changed by human's use of land,for example,the growth of population,rapid urbanization and unreasonable land distribution,all of this will directly lead to the change of service value.Therefore,this paper obtained the land use dynamic data of hua'nan county based on the interpretation data of the third period from 2000 to 2015.At the same time I evaluated the ecological service benefits of different land types in hua'nan county,and I found patterns of change,further explore the factors influencing the change,And I can provides the basis for realizing the ecological service value enhancement of hua'nan county.hua'nan county in northeast China,jiamusi city.By 2016,the total land production value of hua'nan county has reached 1.2357 million yuan,meanwhile,the grain output here has reached1.2944 million yuan.Compared with the same county in heilongjiang province,it is at a higher level.Now,this paper takes hua'nan county as the research area,which mainly involves 6 towns and4 townships.I have used the relevant models which was founded by scholars such as Costanza and Xie Gaodi to evaluate the ecological service value of hua'nan county.At the same time,I adopted STIRPAT model to study the impact of social and economic factors on the value of ecological services in hua'nan county.Has finally revealed the spatial and temporal law of its influence degree,And has put forward feasible suggestions for hua'nan county to be able to sustainable development.The main conclusions are as follows:(1)Changes of land use types in hua'nan county in the past 10 yearsThe number of cultivated land in hua'nan county has been decreasing for 5 consecutive years,from 2005 to 2010,the overall change rate was negative,at-1.03%.At the same time,the number of woodlands is decreasing which overall downward volatility of 2.05 percentage points;Continued into 2015,their Numbers continued to decline,with rates of-1.88% and-4.40%.During this decade,only rate of change of construction land presents positive number,the maximum value is 16.26,opposite,water use decreases first and then increases.(2)The change of land ecosystem service value in hua'nan county in 10 yearsResearch finding,from 2005 to 2010,the total value of land ecosystem services in hua'nan county increased by 15.83 104 yuan,however,in the following five years,the service value of hua'nan county decreased year by year,and the overall downward fluctuation was 14.18 104 yuan.At the same time,from 2005 to 2010,the total ecological service value of different land types in hua'nan county increased by 6.097 108 yuan.Opposite,from 2010 to 2015,it decreased by 3.942108 yuan.Finally,the sensitivity index of the value of land ecological services in hua'nan county.Finally,the sensitivity index of the value of land ecological services in hua'nan county,the minimum sensitivity index of construction land here is 0.0005.However,the maximum sensitivity index was water land,with a sensitivity of 0.8013.(3)Factors affecting the value of land ecosystem services in hua'nan countyThe population,affluence and technology of hua'nan county are analyzed,I found that the population had the largest impact on the intensity,which was-0.651,that means in this ten years,the population which of hua'nan county has grown at the first and then stability.Through detailed analysis found,there is a negative correlation between the two;However,richness and technological progress are positively correlated with ecological value.Among them,the lowest technical progress was 0.01.during this decade,hua'nan county has been driven by technological progress.Our scientific reclamation and professional use of land can improve the value of ecological services.Richness was 0.115.(4)Corresponding countermeasures are put forward according to the actual situationAccording to the value of ecological services presents a dynamic fluctuation at hua'nan county,meanwhile,it is combined with the specific situation of hua'nan county.I put forward constructive Suggestions,concrete containing:Protect the quality and area of cultivated land;Set up corresponding measures the reclamation of cultivated land;Keep population growth under control as planned;Rational development of construction land,and Rational distribution of land;We will ensure that the government strengthens its oversight and management mechanisms. |
PDF Full Text Request