南京市农业资源开发效益的评估

根据南京市农业资源开发的有关资料，参照已有的研究成果，拟定了农业资源开发效益评估的指标体系，确定其仅重分配，分别对农业资源开发后的经济效益，生态效益，社会效益及综合效益进行了评估。所得结果，为南京市农业资源的进一步开发利用提供了依据。     

浙江磐安蕨类植物资源及其开发利用

调查统计，磐安共有蕨类植物112种，隶属于60属、34科。地理成分分析表明，种的地理成分以东亚分布，特别是中国一日本分布为主，区系显示出较明显的亚热带一暖温带过渡的特征。同时从水平分布、垂直分布和生态分布三种分布型分析了磐安蕨类植物资源的分布规律，并根据其用途，划分为药用植物资源、食用植物资源、观赏植物资源等。在以上研究的基础上，提出了合理开发利用磐安蕨类植物资源的一些建议。     

三江平原区域生态旅游规划研究

三江平原是中国著名的低平原沼泽分布区、农业生态示范区和国家重要的商品粮生产基地,拥有丰富的旅游资源.对三江平原区域旅游资源保护性开发,具有非常重要的社会意义、经济意义和生态意义.三江平原旅游资源主要分为自然景观、历史文化景观和现代农业观光景观.三江平原区域旅游应充分挖掘该区湿地资源,推广湿地旅游品牌,整合旅游资源,规划...     

区位因素影响下高铁站区产业结构特征——基于POI数据的实证分析

高铁站被视为拉动城市经济增长的新型空间,研究其周边产业结构对指导高铁站区的开发具有重要意义.本文选取了全国范围内9个不同区位、不同等级的高铁站为研究对象,以高铁站周边3000m范围内10类产业的POI信息作为研究数据,通过Ripley's K函数、核密度估计和产业指数等方法探索不同区位下高铁站区的产业结构特征.研究发现...     

四川扎如沟旅游资源开发初探

扎如沟是九寨沟的一条支流，位于九寨沟东北角偏北方向，它以其丰富的自然和人文资源，良好的区位优势，成为九寨沟下一步最具有开发价值的区域。详细阐述了扎如沟现有的资源优势，提出了统一规划，分步实施，突出特色，突出主题，实施品牌战略，开发与保护并重的资源开发总体思路，并给出了一系列切实可行的旅游产品设计方案。     

A sand-production control system for gas production from clayey silt hydrate reservoirs

Sand production is a crucial problem during the process of extracting natural gas from hydrate reservoirs. To deal with sand-production problems systematically, a sand-production control system (SCS) is first proposed in this paper, specialized for pore-distributed clayey silt hydrate reservoirs. Secondly, a nodal system analysis method (NSAM) is applied to analyze the sand migration process during hydrate exploitation. The SCS is divided into three sub-systems, according to different sand migration mechanisms, and three key scientific problems and advances in SCS research in China Geological Survey are reviewed and analyzed. The maximum formation sanding rate, proper sand-control gravel size, and borehole blockage risk position were provided for clayey hydrate exploitation wells based on the SCS analysis. The SCS sub-systems are closely connected via bilateral coupling, and coordination of the subsystems is the basis of maintaining formation stability and prolonging the gas production cycle. Therefore, contradictory mitigation measures between sand production and operational systems should be considered preferentially. Some novel and efficient hydrate exploitation methods are needed to completely solve the contradictions caused by sand production.© 2019 China Geology Editorial Office.     

万年县神农宫旅游资源综合评价与开发对策

溶洞作为一种重要的旅游资源,以其幽、奇、险等特点得到了广泛的旅游开发。科学、合理地对旅游资源开发价值进行评价是旅游开发的前提和基础。文章以万年县神农宫为研究对象,采用层次分析法和模糊综合评判法对其岩溶洞穴旅游资源的开发价值进行了系统评价,结果表明:神农宫的评价得分为87.38分,为优良级旅游资源,具有较高的旅游开发价值。在进行综合评价的基础上,将神农宫旅游资源的评价因子分为高开发价值和中低开发价值两个层级,并提出了相应的开发建议。      

我国西部国土资源及其开发对策

国土资源开发在我国西部地区经济发展中具有重要的地位和作用,但是也受许多因素的制约。西部国土资源开发必须突出重点、科学规划并采取多种优惠扶持政策。     

THE PROBLEMS OF WATER RESOURCES IN NORTH CHINA AND THE STRATEGY

North China, whose total area is 420,000 km2, covers 2 provinces and 2 cities (Shanxi and Hebei provinces, Beijing and Tianjin) and the territories of Henan and Shandong provinces to the north of the Huanghe (Yellow) River, and part of the Inner Mongolia Autonomous Region and Liaoning Province. Most of this region, which is situated in the semi-humid, semi-arid continental climate temperate zone, gets an annual precipitation of 500-600 mm, whereas, the perennial average amount of total water resource is 50.99 billion m3, including 33.82 billion m3 of surface water, 32.94 billion m3 of ground water and 15.77 billion m3 of their duplication. Due to the intensive exploitation of water resource caused by the deficiency of water resource in North China, key elements of water balance was changed, runoff volume reduced, evaporation increased, vertical movement of moisture strengthened, water circulation pattern transformed from open system into regionally closed system; meanwhile, due to the incompetent water     

地下水资源开采潜力评价的综合因素浅析

浙江省现有地下水开采潜力的分析与评价方法存在着不足,本文结合乐清市地下水资源开发利用规划实例,浅析浙江省地下水资源开采潜力分析与评价的综合影响因素.