适应地貌与气候特征的海河流域传统民居聚落研究

以分水岭作为研究范围,在流域的基础上进行了民居聚落研究,先对海河流域的流域范围、气候特征、地貌特征、水系特征进行了分析,进而给出其所处的文化亚区特征。以此为基础,探讨了区域范围内的民居聚落适应地貌与气候的技术特征,进而发现其生态文化特征,是将人居环境建设与保护自然环境相合,将城镇化进程与区域自然和人文环境相结合的创新性研究。     

森林对降雨径流的调蓄转换规律研究

本文通过分析森林不同层次对降雨径流的调节转换规律,建立相应模型,并依据不同足度下地面流的产汇流特点,建立流域森林水文模型。从四个流域的模拟结果看,森林对流域雨径流调节,转移和传递规律明显。     

嘉陵江碗厂沟流域分布式水文模型设计初探

把碗厂沟流域分成一系列的单元和作用层,以单位和作用层为基本单位,连续计算每个单元和作用层的水文过程和水文、气候要素变化,将各水文过程耦合起来而设计流域分布式水文效应模型。     

羊窝河流域退化高原湿地水文分析

通过数字化地形图构建大山包羊窝河流域数字高程模型,生成羊窝河流域DEM,利用DEM提取流域水系、子流域、汇流方向及汇流量．结合河道简化,用GIS模拟出羊窝河流域地表径流及筑坝后黑颈鹤适宜栖息生境动态变化．进一步研究羊窝河流域筑坝地点选择、筑坝高度与汇水量关系,为羊窝河流域湿地水文恢复工程建设提供依据．     

湘西自治州林区公路选线探讨

根据林区气候、地形、地貌、地质、水文、林业的特点和线形设计的基本要求，探讨林区沿溪线、越岭线、山脊线和山腰线的布设原则、方法和应引起注意的问题，使公路线形设计与自然地形和减少林地损失相协调。     

小德岗造林示范基地的实践与经验

小德岗造林示范基地位于距离石市20km的信义镇信义村。这里地域广阔，气候冷凉，地貌类型多，适合各类树木生长。小德岗流域位于信义村东部，内有1个自然村已整体搬迁。总面积323．4hm^2．其中弃耕地面积97．4hm^2，宜林荒山坡及沟道196．4hm^2，可治理面积292．47hm^2。小德岗流域属暖温带大陆性季     

黄家村小流域综合治理效益分析

黄家村小流域位于集宁郊区,平均海拔高1553米,流域总面积10.28平方公里,水土流失面积6.6平方公里。多年来,该地区由于地形、地貌、气候及人为因素的综合作用,水土流失十分严重,农、牧、林各业发展不平衡。为了改善当地的生产生活状况,尽快使农民脱贫致富,必须采取综合治理措施,改善水土条件。     

川西高山林区森林采伐方式和更新技术的粽合考察报告(1958)

一、川西林区自然地理特点1.地理位置本地区位于北纬30°30′—32°,东经102°—103°50′之間,在四川省西部,行政上属于阿坝藏族自治州的范围。本区是西藏高原的东部边缘地带、是岷江和大渡河流域的上游。2.地貌地貌对森林是一种间接因素,但是它对森林的影响是多方面的。地貌影响气候和土     

日光温室莆萄的生理病害及防治

石羊河流域属典型的资源型缺水地区，且水资源利用效率偏骶，节约用水和提高水资源利用效率是石羊河流域综合治理的主要措施之一。利用设施栽培条件和当地充足的阳光资源及冷凉的气候条件，发展日光温室红提葡萄优质高效延后栽培，可以有效提高单位体积水资源利用效率，将鲜果采收期调控到元旦、春节期间，经济效益极高，近年在该区域发展较快。     

湛江林业的历史性巨变

湛江林业的历史性巨变文图雷嗣鹏谢池石湛江，位于我国的南方，广东省的雷州半岛。面对世界地图，你会发现，与雷州半岛同一纬度线上的阿拉伯半岛、西非撒哈拉、美洲墨西哥南部高原，都有沙漠的地貌形态和干旱的气候特征。不能幸免，历史上雷州半岛也是一个赤地千里的...     

在生态土地分类中的作用(英文)

本文描述了研究区吉林省东部山区的地文景观特点和自然植被状况,阐述了生态土地分类的定义、基本特点及发展。根据研究区的地形图和卫片结合试点的劲松林场480个样点植被现状的调查数据,探讨了基于坡度、坡向、植被和海拔的四个分类因素下的5类和15类生态土地类型图。生态分类系统是确定、描述和绘制生态系统类型图的方法。本文研究是生态分类系统在吉林省东部针阔混交林区试验应用的一部分。图5表1参14。     

GIS在生态土地分类中的作用

This paper depicted the physiographic landscape features and natural vegetation situation of study area (the eastern Jilin Province), and expatiates the definition, basic characters and its development of Ecological Land Classification (ELC). Based on the combination of relief map, satellite photography for study area and vegetation inventory data of 480 sample sites, a 5-class and a 15-class ecological land type map was concluded according to 4 important factors including slope, aspect, vegetation and elevation. Ecological Classification System (ECS) is a method to identify, characterize, and map ecosystems. The Ecological Land Type (ELT) was examined and applied initially in eastern Jilin Province. Foundation item: This paper was supported by Chinese Academy of Sciences “100 people” project and the Open Research Station of Changbai Mountain Forest Ecosystem. Biography: XIAO Bao-ying (1974-), female, postgraduate in Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, P. R. China Responsible editor: Zhu Hong     

中华双短姬蜂（膜翅目：姬蜂科）雄蜂记述

报道在辽宁海城发现的双短姬蜂属Bicurta Sheng, Broad&Sun,2012、中华双短姬蜂Bicurta sinicus Sheng, Broad&Sun,2012，简介属的主要鉴别特征；首次对雄蜂的形态特征进行描述，提供彩色整体图和部分特征图。     

Post-fire analysis of pre-fire mapping of fire-risk: A recent case study from Mt. Carmel (Israel)

The recent devastating wildfire on Mt. Carmel provided a unique opportunity to evaluate a fire-risk map constructed for the region, published two years ago in this journal. This largest forest fire in the history of Israel, occurred during December 2010, covering 2180 ha, burning more than half-million trees and causing the loss of life of 45 people.A study of fire risk in this area was conducted between 2007 and 2009 utilizing a combination of Monte Carlo simulation of spatial spread of fire ignition with fire behavior model (FARSITE). The fire risk map produced in 2009 is assessed here with reference to the area burnt during December 2010. The results showed that most of burnt areas corresponded to high risk levels in the risk map. According to a null model, the five lower risk levels taken together would have corresponded to 50% of the burnt area, while in fact they were presented in only 5.6% of the area. In contrast, the three highest risk levels, for which the null model expectation would be a representation of 30%, were represented in 87% of the area. Comparing the fire risk map against the map of the real recent fire provided support to the general approach, and strengthened the confidence of our fire risk model.     

退耕还林(草)成效主要限制性因子筛选研究

退耕还林(草)受生态因子和树草种及人为栽培等众多因子直接影响，为提高退耕还林还草的成效，如何选取主要限制性因子，基于应用GIS专题图层叠加技术，从而研究单个或多个限制性因子及众多因子之间的调节措施，减少不利影响，使退耕还林还草确保成活，趋向覆盖85％以上，达到山更绿、水更清、天更蓝。     

中国发现寄生高山毛顶蛾的毛顶蛾邻凹姬蜂（膜翅目：姬蜂科）

报道采自青海寄生高山毛顶蛾Eriocrania semipurpurella alpine Xu,1990（寄主新记录）的姬蜂科中国一新纪录种：毛顶蛾邻凹姬蜂Lathrolestes clypeatus eriocraniae Seyrig,1928,介绍其分布;简介属的主要鉴别特征;对形态特征进行详细描述,提供彩色整体图和部分特征图。     

基于GIS的东莞市大岭山森林公园信息资源可视与表达

文章应用GIS技术对广东省东莞市大岭山森林公园信息资源进行计算机图形化的管理,并通过电子地图的方式进行快速、高效关联,在此基础上,针对各类专题要素的特点,设计了不同的地图符号进行表达,同时采用柱状、饼状等统计图表方式展示各类统计数据,从而实现了对大岭山森林公园信息资源的可视化表达,直观再现了大岭山森林公园的景区、景点分...     

Simultaneous determination of Cu(II), Zn(II), Fe(II), Mn(II), Co(II) and Ni(II) with a single sweep polarography

A new method of simultaneous determining Cu(II), Zn(II), Fe(II), Mn(II), Co(II) and Ni(II) with a single sweep polarography was developed. The experiment condition was studied and the results show that the optimum base solution is that the residue got from evaporating 25 mL mixed solution, 2.5 mL 1.0 mol/L ethylenediamine, 3.0 mL 1.0 mol/L ammonia-ammonium chloride, 5.0 mL 10 % sodium sulfite and 0.5 mL 0.5 % gelatin were mixed and diluted to 25 mL with water. Under the condition of this base solution, the polarography wave shapes of the six cations are ideal and without overlap of the peaks. In this base solution, Cu(II), Zn(II), Fe(II), Mn(II), Co(II) and Ni(II) in synthetic samples were determined with relative errors 0.4–9.4% and relative standard deviations 0.8%-12.2%. Under this experiment condition, one fold of Pb(II), Cr(VI) and Mo(VI) do not interfere with the determination for Cu(II). This method has been used to the simultaneous determination of the amount of the six cations in the samples of soil and Beiqi Tea. The relative standard deviations were 0. l%-2.1% and recoveries were 93.5%-99.0 %.     

侧柏种源苗期生长与原产地气候因子间的典范相关分析

参照典范相关分析原理,研究了侧柏[Playcladus orientalis(L.)Franco]种源二年生苗木调查性状与原产地气候因子两组多元变量之间的关系。结果表明:侧柏分枝数和雌花量与原产地的年均降水量关系密切;雄花量除了与降水因子外,还与温度因子有关;“溢脂”是个值得注意的间接选择性状。根据第一对典范变量的气候因子和生物因子得分值进行分类,划分三个生态区和7个生态亚区。