Topographic controls on alpine treeline patterns on Changbai Mountain,China

The control mechanisms of topography on alpine treeline pattern are critical to understanding treeline dynamics and future changes. These mechanisms have not been understood quite well enough because of increasing human disturbance and low data resolution. In this study, the relationship between the treeline pattern and topography was analyzed based on high spatial resolution remote sensing data and a digital elevation model in an area in Changbai Mountain with little human disturbance. Future treeline patterns were also predicted. The results showed that(a) aspects with high solar radiation and low snow cover have a high coverage rate of trees,(b) the peak coverage rate of trees switches from low slopes(5°) to medium slopes(5°~25°) as the elevation rises because of the extreme environment,(c) the coverage rate of trees is a function that depends on environmental factors controlled by topography,(d) the future treeline pattern is controlled by new temperature mechanisms, new environmental factors and the reallocation effect of topography. Our research implies that topography controls the treeline pattern and changes in the treeline pattern associated with global warming, due to the effect of global warming on environmental factors. This study may well explain the causes of heterogeneous changes in the treeline pattern in the horizontal direction as well as differences in treeline response to climate warming.     

金石高尔夫球场

金石高尔夫球场由美国著名高尔夫球场设计师皮特．汤姆逊担纲设计,球道充分利用了金石滩的地形地貌,很多果岭紧邻大海,惊险无比,     

陕北黄土高原正负地形研究(英文)

The Loess positive and negative terrains (P-N terrains), which are widely distributed on the Loess Plateau, are discussed for the first time by introducing its characteristic, demarcation as well as extraction method from high-resolution Digital Elevation Models. Using 5 m-resolution DEMs as original test data, P-N terrains of 48 geomorphological units in different parts of Shaanxi Loess Plateau are extracted accurately. Then six indicators for depicting the geomorphologic landscape and spatial configuration characteristic of P-N terrains are proposed. The spatial distribution rules of these indicators and the relationship between the P-N terrains and Loess relief are discussed for further understanding of Loess landforms. Finally, with the integration of P-N terrains and traditional terrain indices, a series of un-supervised classification methods are applied to make a proper landform classification in northern Shaanxi. Results show that P-N terrains are an effect clue to reveal energy and substance distribution rules on the Loess Plateau. A continuous change of P-N terrains from south to north in Shaanxi Loess Plateau shows an obvious spatial difference of Loess landforms and the positive terrain area only accounted for 60.5% in this region. The P-N terrains participant landform classification method increases validity of the result, especially in the Loess tableland, Loess tableland-ridge and the Loess low-hill area. This research is significant on the study of Loess landforms with the Digital Terrains Analysis methods.     

卫星遥感监测执法

卫片是卫星遥感影像图片的简称,是利用卫星遥感监测等技术手段制作的叠加监测发现的地形地貌变化位置信息及有关要素后形成的专题影像图片.它可以迅速有效地发现土地违法行为,使执法监察部门的查处精确高效.     

西南省域地震灾害耦合因素分析

利用西南震害资料,对西南省域（云南、四川、重庆、西藏、贵州）在一定时空尺度上M≥5．0历史地震事件活动水平及震害特征进行系统分析,找出地震灾害（包括人员伤亡、经济损失、次生灾害等）的时间发展特征、空间分布特征和强度分级特征;研究地震灾害与西南区域人口分布、经济水平、地形地貌、人文因素之间的耦合关系,为进一步减轻、减少地震灾害应急处置的不确定性和风险性提供有效建议。     

固阳县雹灾时空分布及防御

固阳县位于大青山北麓,地处40°42′～41°29′N,109°40′～110°41′E,属中纬度半干旱大陆性季风气候。南部大青山山恋起伏,中部滩川交错,北部丘陵广布,山地、丘陵约占全县总面积的90%以上。特殊的地形地貌造成了冰雹灾害频发多发,是固阳县主要气象灾害之一。     

延安黄土丘陵沟壑区地质灾害易发性浅析

在详细分析延安黄土丘陵沟壑区的地形地貌类型、斜坡的坡体结构、地质灾害类型的基础上,利用1:1000地形图为底图进行地质灾害的易发区划分分析。结果表明,对该区居民生命财产安全造成重大威胁且防范困难的地质灾害类型为不稳定斜坡(黄土滑坡、黄土崩塌、基岩崩塌)隐患,黄土陡坡和基岩陡坎区地质灾害高且易发。     

利用遥感技术开展河北省迁安铁矿区矿山地质环境调查与评价技术研究

矿山地质环境问题分类和调查是其评价的基础,针对河北省迁安铁矿矿业开发特点,基于遥感手段,建立一套科学合理、实用性强的矿山地质环境评价指标和标准体系,客观真实地评价示范区生态环境动态变化,经实地验证所得到的结果客观合理,可信度高。研究的开展为后续进行矿业开发区的发展和矿山环境治理恢复奠定了基础。     

美丽与哀愁

从地图上看台湾,总容易产生很多联想。中国的版图像一只雄鸡,台湾岛和海南岛正好就是两只鸡爪,而台湾岛本身的平面形状则恰似一扇芭蕉叶,如果再结合地形地貌,其立体构形又正如一只纺线的梭子——也有人说像大海中畅游的鱼儿露出脊背。无论怎样比喻,在蓝色波涛的围抱中,美丽的台湾岛都为我们带来了视觉上的审美愉悦。     

应用深地震反射技术揭示喀斯特地区深部地质结构特征

本文以广西南盘江-桂中坳陷为例介绍了喀斯特地貌区的深地震反射采集方法技术,来揭示地表喀斯特地貌发育的广西南盘江-桂中坳陷下深部结构.为了获得高信噪比的深地震反射资料,针对该区地表及深部复杂性情况,采取以下六个技术措施:高精度多方法联合测量技术,干扰波特性分析及压制,面向目标的观测系统设计,加强炮检点的选点工作,加大试验力度选取适合的激发和接收参数,多种针对性静校正处理方法.其中,干扰波特性分析及压制方法和技术实施是获取喀斯特地区深部结构的技术难点,也是前提和保证;多种针对性静校正处理方法是后期室内处理改善深部结构资料品质的关键.通过采取以上技术措施将大大提高了资料信噪比,改善了资料的品质,获得了广西南盘江-桂中坳陷下的较为清晰的深部结构特征.这为此类地区的地震探测提供了采集实例和探测方法依据.