Utilization and sustainable development of island mountains in China

The island mountain utilization is a kind of mountain utilization. Although the islands cover little area, they can be used as the base of marine development. The sustainable development of island mountains is of significance to marine development. There are more than 6500 islands (including the South China Sea Islets) in China, and most of them are continental islands which are the extension of continental mountains extent towards sea. For this reason, there are many hills but few mountains, the area of hills makes up more than two thirds of the whole land area. In order to keep ecological balance of islands, the utilization of island hills and mountains should take exploitation of forests as the main to conserve water source and water-soil, and forests become an important factor in keeping ecological balance and sustainable development of islands. At the same time we should make good use of forests through setting up forest nature protecting area and forest parks and developing forest tourism. A part of research achievements of the project subsidized by National Natural Science Foundation (No. 49171026).     

大理州山地日照时间的时空分布特征

基于数字高程模型（DEM）模拟计算了大理州山地日照时间的时空分布,结果显示,除了日照百分率外,坡度、坡向和地形之间的相互遮蔽对日照时间的分布有很大的影响。冬季太阳高度角较小,地形遮蔽对日照时间的影响很大,夏季相对较小。遮蔽系数4月最大,12月最小。一年中的任意时刻随着坡度的增加日照时间减少。坡向对日照时间的影响有很强的...     

HC600型全液压动力头便携式钻机在陇东南山区生产应用效果及经济性分析

通过HC600型全液压动力头便携式钻机在武山温家沟金矿区、文县筏子坝外围铜矿区进行NQ、BQ型金刚石绳索取心钻探的效果,分析了全液压动力头便携式钻机相对于立轴式钻机的优点、不足及其经济性,提出全液压动力头便携式钻机在陇东南山区的适用性及我国地质岩心钻机发展的趋向。     

Guide to Authors： Journal of Mountain Science

<正>AIMS AND SCOPE(Editorial Policy)The Journal of Mountain Science(JMS)is devoted to mountains and their surrounding lowlands-ecoregions of particular global importance,with a particular emphasis on the important highlands/mountains in the world,such as the Tibetan Plateau,the Himalayas,the Alps,the Andes,the Rockies and many other mountain ranges of our planet.     

低丘缓坡荒滩等未利用地开发利用宜建适宜性评价——以山东青州市为例

以青州市为例,对低丘缓坡荒滩等未利用地开发利用宜建进行适宜性评价,选取自然、社会、生态等因素的指标作为参评因子,确定标准值及权重,得出4种评价结果:最适宜建设、适宜建设、基本适宜和不适宜。     

Energy fluxes and melt rate of a seasonal snow cover in the Moroccan High Atlas

ABSTRACT

In this study, we used an energy balance model and two simple methods based on readily available data to identify the processes driving the point-scale energy and mass balance of the snowpack. Data were provided from an experimental site located at 3200 m. All models were evaluated by comparing observed and modelled snow water equivalents. Performances are variable from one season to the next and the energy balance model gives better results (mean of root mean square error, RMSE = 25 mm and r² = 0.90) than the two simplified approaches (mean of RMSE = 54 mm and r² = 0.70). There are significant amounts of snow sublimation but they are highly variable from season to season, depending on wind conditions (between 7 and 20% of the total). While the main source of energy for melting is net radiation, the amount of heat brought by sensible heat flux is significant for two of the most windy snow seasons.

Editor Z.W. Kundzewicz Associate editor not assigned     

Stream macroinvertebrate communities change with grassland afforestation in central Argentina

Lotic ecosystems are highly affected by land use changes such as afforestation of natural areas for management or commercial purposes. The aim of this study was to analyze the effect of pine plantations on benthic invertebrate communities in mountain grassland streams. Additionally, we assessed if the hydrological period modifies the effect of afforestation on stream invertebrates. Three headwater streams draining grasslands (reference streams) and three draining plantations of Pinus elliottii were selected in a mountain watershed of Córdoba province (Argentina). Hydrologic and physicochemical variables were registered and benthic invertebrate samples were collected in each stream at two different hydrological periods. Total invertebrate abundance, richness and diversity were reduced in afforested streams as well as the number of indicator taxa. In addition, invertebrate functional structure (i.e. taxonomic richness and total and relative abundance of functional feeding groups, FFG) showed differences between streams with different riparian vegetation and between hydrological periods. Total abundance of all FFGs was lower in afforested streams and scrapers’ relative abundance was higher in grassland streams at the low water period. In addition, in most FFGs richness was diminished in afforested streams. Changes in light intensity, hydrology and coarse organic matter inputs produced by afforestation alter fluvial habitats and consequently the composition and trophic structure of invertebrate communities in grassland streams of Córdoba mountains.     

祁连山冬季降雪个例模拟分析(Ⅰ):降雪过程和地形影响

利用部分改进了的中尺度数值模式MM5V3对2006年2月7～8日祁连山一次降雪过程进行了三重双向影响嵌套模拟研究,模式对雪带分布的模拟与实测基本吻合.重点分析了此次降雪过程中的热力动力特征和云的微物理结构,并通过地形敏感性试验,研究了祁连山地形对降雪的作用.结果表明:降雪过程中有低层西北湿冷气流向祁连山区输送水汽在山前形成大值区,气流除在祁连山周围绕流外同时沿祁连山北坡爬升.降雪前期空气饱和层和上升气流区比较深厚,为祁连山北坡降雪中心的形成提供了有利的动力热力条件,降雪后期有高空干冷下沉气流侵入使降雪减弱.这次过程为冷性稳定层云降雪过程,水成物含水量大值区也主要分布于祁连山北坡和山顶附近,冰晶和雪分布在6 km以下,在冷云顶存在0.06 g·kg-1的过冷云水.祁连山高大地形对大范围降雪落区无明显影响,但对祁连山北坡降雪中心形成有直接影响.降低地形高度后,山顶无法形成上升运动和云粒子,迎风坡云体发展减弱.地形对降雪增幅中心主要位于祁连山北坡,24 h最大增幅达3 mm.     

河南桐柏地区铜锌多金属矿床的微量元素和稀土元素特征及成因意义

为了探讨河南桐柏地区铜锌多金属矿的成因,采用ICPMS对刘山岩铜锌矿床、大栗树-方老庄铜锌矿床、羊圈铜矿化点的矿石和矿化岩石的微量元素和稀土元素进行测试。根据研究区铜锌矿石的微量元素和稀土元素特征将其分为4种类型:第一类REE配分曲线右倾,Eu异常不明显,Ce弱负异常,HFSE相对MORB弱亏损,Zr、Ti弱负异常;第二类REE配分曲线右倾,Eu负异常,Ce弱负异常;第三类REE配分曲线右倾,Eu明显正异常,Ce负异常,HFSE相对MORB强烈亏损,Zr、Ti强负异常;第四类REE配分曲线平坦,Eu明显正异常,Ce弱负异常,HFSE相对MORB亏损,无Zr、Ti异常。研究表明:桐柏地区铜锌多金属矿床为海底火山成因块状硫化物矿床,矿石和矿化岩石与矿区火山岩的微量元素和稀土元素地球化学特征相似,第一类与矿区基性火山岩类似,第二类与矿区酸性火山岩类似,第三类指示高温热液流体与海水发生了对流混合且残留相有较多难溶矿物,第四类指示源区为亏损地幔。这些特征表明成岩与成矿的物质来源具有一致性,同为经历早期多次熔融事件的地幔源区的部分熔融的产物。