森林公园生态旅游作为新兴的旅游形式,其特有的康养性及教育性,已经越来越成为当前旅游行业关注的热点话题.以普洱、西双版纳的森林公园为例,分析生态旅游发展现状、主要做法及存在问题.提出完善政府主导管理模式、利用非正式制度合情补充国家正式制度、适当设立非量化指标的动态测量体系,建设高水平生态旅游人才队伍,形成自然保护地的生态旅游方向引领以及实现与周边旅游资源的优势互补的发展路径.
本文概述了吉林省国家级公益林现状,分析了公益林的结构、质量及生态价值,指出管理中存在的问题及区划中存在的局限性,并提出科学、合理管理的建议.
本文分析了新建京张铁路在使用林地过程中对项目区环境和林业建设的各种影响,并提出相应对策和建议.
津石高速公路的建设穿越天津市北大港湿地自然保护区,工程对湿地自然保护区景观生态系统、水环境、土壤环境和生物安全等会造成一定影响.该文分析了工程施工期间和运营期对自然保护区的影响范围、作用方式以及影响程度.并相应对植物保护、野生动物保护、水土保持、污染防治方面提出解决方案.
林业生态经济体系建设是整个生态环境中的重要部分,对于提高我国环境质量起着举足轻重的作用.结合当前我国林业生态经济体系建设的现状,围绕存在的问题,提出了不断改革,创新林业生态经济发展模式等对策.
随着经济的快速发展,林业生态在国民经济中的作用愈发重要.针对当前林业生态经济效益的现状,重点从提升途径上进行了分析.
The architecture and implementation technique of WebGIS are always the focus of scholars in its rapid developing process.Aiming at disadvantages of high complexity,poor interactive experience,and low response efficiency in traditional WebGIS application,this paper proposes a rich WebGIS application framework based on RIA/SilverLight and REST technologies which was divided into data access layer(DAL),business logic layer(BLL) and user interface layer(UI).Silverlight is an application framework for creating and delivering rich internet applications(RIA) and media experiences on the Web,which combining with the representational state transfer(REST) software architecture style can significantly remedy these shortages of traditional WebGIS application mentioned above.Firstly,in this paper the detailed description on designing and building steps of spatial databases were given,and the optimization experiences on spatial database were shared.Then the composition of business logic layer and its operating mechanism had been analyzed.To improve the efficiency of the user interface layer,the Model-View-ViewModel(MVVM) architectural pattern had been adopted.And to follow the user's habit,the office ribbon style had been used visually.The code-behind was programmed with.NET C#,and according to different function types,it was designed into event center component,configuration management component,UI interactive component,map container component,control management component,auxiliary function component,and the event center component is the communication hub.Finally,based on this framework,a rich WebGIS application which named LightGIS had been developed.It showed that the applied framework can effectively improve the efficiency,enrich user's experience and enhance the system capability.
Four satellite monitoring technologies of forest fires are introduced in the paper,including NOAA/AVHRR satellite monitoring,EOS/MODIS data monitoring,FY series satellite monitoring and HJ satellite monitoring.The development status of satellite monitoring for forest fires both at home and abroad is described,and the research directions of satellite monitoring for forest fires are also prospected.
Based on investigation data from a permanent secondary forest plot of 1ha in Mopan Mountains,Jilin city,the structure of Tilia mandshurica population was analyzed.Ripley's K function was used to analyze spatial patterns of T.mandshurica population at different growth stages(saplings,small trees and big trees).The results showed that DBH structure of T.mandshurica presented a reverse J distribution and small age individuals accounted more.The spatial pattern of T.mandshurica population was clump for all stems,saplings and small trees,but random for big trees;spatial associations between different stages were repulsed.It indicates that seed dispersal and regeneration mechanism was a key factor to spatial pattern.
