| The content of natural reserve is very comprehensive, and it means certain area that includes water and land. It is divided the lined out by country for the sake of protection natural environment and natural resources, and carried on special protection and management. According to the dissimilarity of the function, natural reserve could be divided into biosphere reserve, forest park, scenic spots area etc. Among them the forest park with its special tour resources is drawing on more and more visitors. The arrival of tourists benefits the development of the local economy, but it also brings some problems. For example, people chopped down the trees inside the forest park for the construction of hotel and amusement facilities. In addition, there is no education for visitor before tour, and no limitation for numerous quantities. If it continues in this way, consequentially, the weak ecological environment in the natural reserve will be deadly destroyed. The ecological function and value will dramatic decline. These situations are unfavorable for sustainable development of forest park. So it is necessary that research ecological function and value of forest park and analyze influence of visitors and ecological system. There are many analytical methods about ecological function and value of forest park, because of the contents of ecological function and value are extensive. Currently, many methods can be used to analyze ecological function, such as traveling environmental capacity analysis; ecological function area planning method; LAC(Limits of Acceptable Change) planning method; ecological footprint method and so on. There are many methods can be used for resource value, just like market price method; shadow price method; contingent valuation method, etc. But these methods all have limitation, can not represent ecological function and value really.According to the principle of inheriting and developing sustainable development and the Marx Value Theory, in this article some forest park was used as the target. By calculated three contents of traveling environmental capacity, forest resources value and tourist ecological footprint, make people change previous viewpoint to ecological function and value of forest park, and make people realize valuable property of natural resource. By revised traditional analysis model and changed some parameters, make new model can really reflect the level on ecological function and value of forest park and the relation between tourist and environmental impaction. The analysis procedure is shown as follows.(1) Carry on to the traveling environmental capacity analyzing, and link visitor's amount and environmental impaction. The date of traveling environmental capacity can respond the level of the forest park ecological function, the result is very important reference about resource exploitation and environment protection of forest park. The bigger the traveling environmental capacity is; the bigger the ecological function of forest park is; the bigger the visitor's activity that can bear is. The revised formula is: C is annual traveling environmental capacity of forest park; N is the amount of day that can travel every year; Xa is the area of scenic spot of number a; ya is the proper area that each visitor occupies; Li is the length of the sight-seeing circuit of number i; li is length of path for each visitor occupies properly; T is open time for forest park opens everyday; t is average time for each visitor in the forest park. In the revised formula, in order to avoid computing interactively, the method of compute turnover rate about every scenic spot is changed, the turnover rate of forest park is substituted. At the same time, the area method and path method are combined because of tourists are not only in the every scenic spot, but also on the every tourism route. The revised formula can reflect real situation in forest park because of use area method and path method simultaneous. Moreover, in order to reflect the relation between visitor's amount and environmental impaction, percentage of forest cover and building density of artificial landscape and density of tourist are selected for designing a system of environmental impaction assessment, and divide influence degree. According to influence degree, the tourism environmental level of forest park would be appraisal. In this way, the relation between visitor's amount and environmental impaction would be reflected, and the disadvantage of calculating traveling environmental capacity alone would be covered.(2) According to compensation value theory, forest value can be divided into use-value and compensation-value. Use-value reflects forest's utility to people; compensation-value reflects the feature of forest park, including supply sightseeing and fancy for people and so on. Use-value and compensation-value are two value relationship of different property, and they could not be added simply. It is a relationship of vector addition between them. The expression is: V= (V d + Vi)2+Vc2 (2)V is total value of forest resource; Vd is direct use-value of forest resource; Vi is indirect use-value of forest resource; Vc is compensation-value of forest resource. The market price method can be used to calculate direct use-value because of the benefit of forest resource can be reflected in the market. In this article the indirect use-value has not been calculated by traditional methods which compute every ecological benefit, because traditional method may create deviation. According to the compensation value theory, coefficient method is proper to calculate indirect use-value of forest resource. The expression is: Vi=Vd×h (3)h is a coefficient by calculating the total value about each ecological function of forest divided by direct using value, it is a empirical value.According to previous research of ecological value, the level of h can be defined by electing some results of similar areas.The compensation value of forest resource reflects traveling value which forest supply to people. In this article, the investigation method is utilized. By selecting expend about ticket; communication; accommodation; dining, the compensation value can be sure. Doing like this way is set out from the visitor's trip expenses, take traveling expends and the cost of protecting forest to the total amount of compensation value. It is a scientific method that can not exaggerate traveling value of forest resource.(3) In this article the traveling ecological footprint model is used to analysis the ecological function of forest park. It is due to the forest park is not similar to general area. The variation of people amount in the forest park is very sharp, and the mobility of tourists would make transferring and exchanging of traveling ecological footprint. Moreover ecological footprint model has some disadvantages such as it requires lots of dates. Therefore ecological footprint is divided into traveling communication; traveling accommodation; traveling dining; traveling tourism in this article. This way is according to the characteristics of forest park and the contents of ecological footprint model. The ecological footprint model is simplified by this way. The expression is: TEF=TEFc+ TEFa+ TEFd+ TEFt (4)TEF is total traveling ecological footprint; TEFc is traveling communication ecological footprint; TEFa is traveling accommodation ecological footprint; TEFd is traveling dining ecological footprint; TEFt is traveling tourism ecological footprint.Calculating ecological footprint by revised model can simply the contents of traveling ecological footprint, it defaults two parts of traveling entertainment and traveling shopping. Moreover, there are not measures about situation of not development in traditional model of traveling ecological footprint. So the measures of ecological compensation and ecological immigration have been complemented in this article. It makes the analysis more complete, and it is a new method for management of other natural reserves.At last the ecological function and value of five forest park have been calculated by revised model. The results show that amounts of tourists in these areas are bigger than their traveling environmental capacity, and the traveling ecological footprints of these areas are higher than the level of sustainable development. Moreover, the indirect use-value of forest resource is much bigger than direct use-value and compensation value.Currently there is not a uniform system for analyzing ecological function and value of forest park. In this article sustainable development was taken as the standard. By revising traditional model, some disadvantages have been pointed out. The revised model is meaningful for sustainable development of forest park.
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