滨海湿地生态旅游资源评价研究     

庄晨辉  李闽丽  张惠光  陈星 《福建地理》2007,(1)

在研究旅游资源评价与湿地资源评价已有成果的基础上,提出滨海湿地生态旅游资源评价及评价指标选取的基本原则,并从客观实际出发,应用层次分析法(AHP),从生态环境、旅游资源和旅游开发三方面着手,构建了滨海湿地生态旅游资源评价体系,并据此进行计算机处理、排序和检验,提出滨海湿地生态旅游资源等级指标及赋分标准,为科学评价滨海湿地生态旅游资源提供依据.  相似文献   

华南沿海地区地震环境特征的定量研究及其在地震区划中的应用          下载免费PDF全文

周庆  叶洪 《地震地质》2001,23(4):581-587

以华南沿海地区为研究区 ,将Bayes公式应用于地震环境特征与地震事件的相关性定量化研究中 ,在GIS技术的支持下 ,由统计某一因素不同类型所占的面积及发生在其上的中强地震数 ,得到地震发生的后验概率。为评价地质及地球物理各因素与地震关系的相对重要性 ,引入了系统工程学中的层次分析方法 ,最终得到研究区内以累积概率为指标的地震综合危险图 ,据此将研究区划分为内带与外带  相似文献   

对沉积混杂作用和沉积混杂岩的再认识     

张世涛  冯庆来 《云南地质》2001,20(1):34-38

回顾了沉积混杂碉的研究历史，指出了沉积混杂岩的分布位置和形成机制，重新给出了沉积混杂岩的定义，依据沉积混杂作用的不同方式划分为四种类型，重力垮塌和重力汉混杂作用，冰筏混杂作用，古喀斯特混杂作用和损落混杂作用，最后探讨了海底混杂岩块的来源和搬运方式。  相似文献   

预破裂中声波信号参数特性     

巴卡.  M 《内陆地震》1996,10(1):79-85

通过对岩石样品进行变形及破坏试验，研究断裂形成过程中的声发射记录（ＡＥ），以找到能解释地震前兆现象的方法．另外，对试验过程中获得的大量数据及资料进行了数理统计处理．  相似文献   

广州城市郊区化的进程及动力机制   总被引：29，自引：1，他引：29  

陈文娟  蔡人群 《热带地理》1996,16(2):122-129

随着城市经济社会的发展，我国一些大城市出现了郊区化的初步征兆，开展了郊区化研究有着重要的理论和实际两个方面的意义。广州是我国少数几个已开始进入城市郊区化阶段的大城市之一。本文分析该市郊区化的进程及动力机制，并提出调控对策。  相似文献   

层次分析法（AHP法）在金矿勘查中的应用—新疆金窝子金矿床为例     

贺连顺 《矿产与地质》1992,6(6):420-424

应用层次分析法（Analystical Hierarchy Process,简称AHP法）确定金窝子金矿床合理的工业品位指标。将影响工业品位的因素及各因素间的隶属关系构成系统的多层次分析结构模型，进行层次排序，制订工业品位指标的总目标，通过分析和计算，确定工业品位指标的最佳方案，取得了较满意的结果。  相似文献   

城市生态地貌学：介绍地貌学的一个新分支   总被引：1，自引：0，他引：1  

丁锡祉 《云南地理环境研究》1990,2(2):42-47

城市生态地貌学是地理学的一个新分支,又是城市学、生态学、地貌学的边缘学科,它研究作为生态因子之一的地貌和其他各因子之间的关系以及在整个生态系统中的作用和地位。在城市生态地貌营力中,特别重视人为迭加地貌营力的作用。  相似文献   

The impact of the nitrogen carryover effect on economic activity and the environment     

Wen-yuan Huang  Russ W. Keim  Yao-chi Lu  N. D. Uri  Terry Kelley 《Environmental Geology》1998,34(2-3):116-127

 The economic and environmental consequences of soil nitrogen tests can have significant impacts on agricultural production. Some of these are explored here. The pre-side-dress soil N-test is evaluated for a hypothetical farmer growing corn at the ARS Sustainable Agriculture Demonstration Farm site in southern Maryland. For a farmer not currently using a soil N-test, adoption of this technology can lead to the enhancement of net farm income and the reduction in nitrogen loss to the environment. This will transpire only if the farmer is currently underestimating nitrogen carryover by more than 25% or applying nitrogen fertilizer based solely on an expected plateau-yield goal. Received: 13 February 1997 · Accepted: 13 May 1997  相似文献   

National indicators for observing ecosystem service change     

《Global Environmental Change》2015

Earth’s life-support systems are in rapid decline, yet we have few metrics or indicators with which to track these changes. The world’s governments are calling for biodiversity and ecosystem-service monitoring to guide and evaluate international conservation policy as well as to incorporate natural capital into their national accounts. The Group on Earth Observations Biodiversity Observation Network (GEO BON) has been tasked with setting up this monitoring system. Here we explore the immediate feasibility of creating a global ecosystem-service monitoring platform under the GEO BON framework through combining data from national statistics, global vegetation models, and production function models. We found that nine ecosystem services could be annually reported at a national scale in the short term: carbon sequestration, water supply for hydropower, and non-fisheries marine products, crop, livestock, game meat, fisheries, mariculture, and timber production. Reported changes in service delivery over time reflected ecological shocks (e.g., droughts and disease outbreaks), highlighting the immediate utility of this monitoring system. Our work also identified three opportunities for creating a more comprehensive monitoring system. First, investing in input data for ecological process models (e.g., global land-use maps) would allow many more regulating services to be monitored. Currently, only 1 of 9 services that can be reported is a regulating service. Second, household surveys and censuses could help evaluate how nature affects people and provides non-monetary benefits. Finally, to forecast the sustainability of service delivery, research efforts could focus on calculating the total remaining biophysical stocks of provisioning services. Regardless, we demonstrated that a preliminary ecosystem-service monitoring platform is immediately feasible. With sufficient international investment, the platform could evolve further into a much-needed system to track changes in our planet's life-support systems.  相似文献   

Comparing future patterns of energy system change in 2 °C scenarios with historically observed rates of change     

《Global Environmental Change》2015

This paper systematically compares modeled rates of change provided by global integrated assessment models aiming for the 2 °C objective to historically observed rates of change. Such a comparison can provide insights into the difficulty of achieving such stringent climate stabilization scenarios. The analysis focuses specifically on the rates of change for technology expansion and diffusion, emissions and energy supply investments. The associated indicators vary in terms of system focus (technology-specific or energy system wide), temporal scale (timescale or lifetime), spatial scale (regional or global) and normalization (accounting for entire system growth or not). Although none of the indicators provide conclusive insights as to the achievability of scenarios, this study finds that indicators that look into absolute change remain within the range of historical growth frontiers for the next decade, but increase to unprecedented levels before mid-century. Indicators that take into account or normalize for overall system growth find future change to be broadly within historical ranges. This is particularly the case for monetary-based normalization metrics like GDP compared to energy-based normalization metrics like primary energy. By applying a diverse set of indicators alternative, complementary insights into how scenarios compare with historical observations are acquired but they do not provide further insights on the possibility of achieving rates of change that are beyond current day practice.  相似文献