Intermediate-scale analysis of landscape characteristics affecting edge formation in burned forests in Samcheok,Korea     

Sang-Woo LEE  Myoung-Soo WON  Joo-Mee LEE  Hai-Gyoung KIM 《山地科学学报》2014,11(2):384-397

Compared to burn interiors, edges exhibit distinct biotic and abiotic conditions that include microclimate, wind speed, sunlight levels, soil composition, moisture content, nutrient availability, population density, and species diversity. This study characterized the landscapes in which burned forest edges formed in Samcheok, Korea. Over the study area, 500-m2 grid cells were generated to capture landscape characteristics. Grid cells intersecting burn boundary lines were designated as edge, while cells without these lines were classified as the interior of burned areas. Topographic variables including slope, elevation, topographic wetness index, solar radiation index, and proportions of fuel and land use types within grid cells were computed in a geographical information system （GIS）. Correlation analysis with modified t-test and regression tree analysis were performed to explore the influences of landscape variables on edge formation with avoiding spatial autocorrelation problems. The results indicated that edges formed at low elevations with mild slopes, high topographic wetness, and low solar radiation. Edges were unlikely to form in areas dominated by Japanese red pines at low elevations. Moreover, heterogeneous land use/cover types contributed significantly to edge formation. Different forest management strategies for different landscape conditions can be more effective for enhancing resilience of forests to fire. Reducing susceptible fuel types might be effective at low elevations, while enhancing forest heterogeneity might be more effective at high elevations.  相似文献   

韩国:分类保护严格耕地转用     

王庆日 《地球》2013,(6)

正韩国《农地法》明确规定,耕地是保障粮食供给和国土环境保护的基础,是左右农业生产力和国民经济的有限资源,应对耕地进行严格保护和适于公共福利的管理。所有利用耕地应向提高农业生产力的方向进行,耕地绝对不能成为投机的对象。为减少因土地私有而导致的耕地利用问题,韩国于1962年制定了农业振兴法,于1992年12月  相似文献   

中日韩海洋水色卫星计划对比分析          下载免费PDF全文

王泉斌 《海岸工程》2016,35(2):59-65

21世纪以来,围绕海洋资源开发、海洋环境安全和海洋权益维护,国际上开展了新一轮的海洋竞争,所有这些竞争都离不开对海洋环境的认知,卫星海洋遥感作为世界各国提升海洋环境认知能力的重要高新技术手段,日益得到各国的重视。海洋水色卫星遥感是重要的海洋探测技术,它通过卫星平台上的探测器对海洋表面的水色进行探测,反演出海洋水体中的叶绿素浓度、泥沙含量及黄色物质浓度,进而得到其他相关信息。文章在概要介绍中日韩三国海洋水色卫星发展历程及性能的基础上,对中日韩三国的海洋水色卫星计划及其应用进行了初步的对比分析,基于参考文献对其异同点进行了阐述与评价,从发展思路与发展方式等角度提出了针对我国未来海洋水色卫星计划发展的建议与启示。  相似文献   

巧划“圈” 找准“点”——韩国首都圈发展规划的演变与启示     

蔡玉梅  宋海荣  廖荣 《河南地质》2014,(6):50-51

京津冀一体化成为当前热门话题,其实早在2004年国家发改委就启动了《京津冀都市圈区域规划》,历经十年迟迟未出台,2014年有望成为破题之年。首都因其特殊的地位,具有很强的人口吸纳魅力,很多国家也曾有过因首都城市病和周边城市发展不均衡等问题,在分散首都功能方面经历了较长时间的探索。其中韩国的首尔首都圈规划在政府主导型国家的首都圈规划中较为典型,对我国编制京津冀首都圈规划,促进京津冀一体化发展具有一定的借鉴意义。  相似文献   

Two climate factors in May that affect Korean rainfall in September     

CHOI Ki-Seon  MOON Il-Ju 《海洋学报(英文版)》2013,32(1):32-47

This study revealed a high positive correlation between rainfall in Korea during September and the trade wind (TW)/Arctic Oscillation (AO) index in May that combines two climate factors, low-level TWs and the AO. This correlation was identified on the basis of the difference in the 850 hPa streamline analysis between the positive and negative phases selected using the combined TW/AO index. In May, the spatial pattern of the anomalous pressure systems is similar to that in the positive AO phase. These anomalous pressure systems continue in June to August (JJA) and September, but the overall spatial distribution shifts a little to the south. Particularly in September, a huge anomalous anticyclone centered over the southeast seas of Japan strengthens in most of the western north Pacific region and supplies a large volume of warm and humid air to the region near Korea. This characteristic is confirmed by the facts that during the positive TW/AO phase, the subtropical western north Pacific high (SWNPH) is more developed to the north and that the continuous positioning of the upper troposphere jet over Korea from May to September strengthens the anomalous upward flow, bringing warm and humid air to all layers. These factors contribute to increasing September rainfall in Korea during the positive TW/AO phase. Because the SWNPH develops more to the north in the positive phase, tropical cyclones tend to make landfall in Korea frequently, which also plays a positive role in increasing September rainfall in Korea.The above features are also reflected by the differences in average rainfall between the six years that had the highest May Ni o 3.4 indices (El Ni o phase) and the six years that had the lowest May Ni o 3.4 indices (La Ni a phase).  相似文献   

韩国对山东省直接投资研究     

江心英  冯春萍 《世界地理研究》2000,9(4):25-31

９０年代以来,韩国对华投资规模不断扩大,其中三分之一以上的韩国投资集中分布于山东省,对山东经济发展产生了深刻的影响。本文以韩国对山东省直接投资为研究对象,重点分析其基本特征、投资动力和山东省吸引韩资的区位优势,并指出其存在的问题及政策建议。  相似文献   

中韩防御海洋灾害合作的前景     

汪兆椿 《海洋开发与管理》2000,17(1):65-67

一衣带水的中韩两国自１９９２年建交以来,两国的海洋科技合作逐渐开展,取得了很好的成果,促进了各自海洋事业的发展,也为今后进一步深入合作打下了良好的基础。中韩两国的海洋科技合作源于共处一个海域,相互有着共同的利益和需要,特别是当今社会对海洋可持续发展的...  相似文献   

韩国首都圈综合计划转变及启示     

蔡玉梅  李景玉 《国土资源》2008,(3):48-50

韩国自1960年以来,伴随工业化和城市化的快速发展,地区的差距也逐渐加大,以首都为中心的圈域地区尤为突出。控制首都圈规模膨胀和促进地方发展一直是首都发展的重要问题。迄今为止,首都圈的过度集中问题仍然存在。首都圈的面积为1.18万平方公里,占国土面积的11.8%。但是,以最基本的人口指标为例,首都圈人口占  相似文献   

韩国海洋渔业管理的启示     

焦桂英  孙丽  刘洪滨 《海洋与海岸带开发》2008,(12):42-48

在韩国的渔业发展早期阶段,渔业是与农业并重的支柱产业,在出口业中发挥了重要作用。但近二十年以来,由于持续的无序捕捞和海洋生态环境的恶化,近海渔业资源萎缩,韩国的海洋渔获量明显减少。近海渔业的渔获量占总渔获量的比例从1980年的56．9％减少到了2005年的40．0％。  相似文献   

韩国海洋渔业管理的启示     

焦桂英  孙丽  刘洪滨 《海洋开发与管理》2008,25(12):42-48

在韩国的渔业发展早期阶段,渔业是与农业并重的支柱产业,在出口业中发挥了重要作用.但近二十年以来,由于持续的无序捕捞和海洋生态环境的恶化,近海渔业资源萎缩,韩国的海洋渔获量明显减少.近海渔业的渔获量占总渔获量的比例从1980年的56.9%减少到了2005年的40.0%.由于海洋渔业资源的衰退以及联合国海洋法引起的捕捞区域缩小,使得韩国海洋渔业从近海捕捞转向远洋捕捞和海洋养殖,制定了渔业资源保护和增殖的政策,减少对近海渔业资源的依赖性.通过对韩国海洋渔业管理的研究,得出其对中国海洋渔业管理的启示.  相似文献