THE SOCIAL IMPACTS OF TOURISM──A Case Study in Dali,Yunnan Province,China

ＴＨＥ ＳＯＣＩＡＬ ＩＭＰＡＣＴＳ ＯＦ ＴＯＵＲＩＳＭ──Ａ Ｃａｓｅ Ｓｔｕｄｙ ｉｎ Ｄａｌｉ，Ｙｕｎｎａｎ Ｐｒｏｖｉｎｃｅ，Ｃｈｉｎａ ＤａｉＦａｎ（戴凡）（ＤｅｐａｒｔｍｅｎｔｏｆＧｅｏｇｒａｐｈｙａｎｄＰｌａｎｎｉｎｇ，Ｕｎｉｖｅｒｓ...     

华西秋雨的多年变化

根据1951—1980年资料分析发现,长江上游宜昌站9月和10月的径流量变化与华西秋雨的变化有密切关系。因此,有可能利用宜昌站1882—1980年的流量资料来研究华西秋雨近百年的变化。分析结果表明,华西秋雨的多年变化具有明显的周期性和阶段性:9月的主要周期约为3年和17年,10月则约为13年。并按照正、负距平的分布特点,将9月划分为8个阶段、10月划分为9个阶段。这些阶段的出现与大气环流的变化有关;9月份与西太平洋高压脊西伸位置有关,10月则与印度低压的强弱相联系。     

T42模式产品在南昌地区大—暴雨中的统计学解释应用

使用1990—1991年5—6月的T_(42)模式产品,采用样本正态化消空剔除手段,分别建立了中雨、大雨的消空方程y_1、y_2及大-暴雨判别方程y_3。y_1、y_2减少空报,y_3减少漏报。3个方程配套使用比用单个方程的效果好,成功界限指数有明显的提高,1992年试用效果较好。     

Simulation of the asian monsoon by IAP AGCM coupled with an advanced land surface model (IAP94)

ＳｉｍｕｌａｔｉｏｎｏｆｔｈｅＡｓｉａｎＭｏｎｓｏｏｎｂｙＩＡＰＡＧＣＭＣｏｕｐｌｅｄｗｉｔｈａｎＡｄｖａｎｃｅｄＬａｎｄＳｕｒｆａｃｅＭｏｄｅｌ（ＩＡＰ９４）ＺｅｎｇＱｉｎｇｃｕｎ（曾庆存）,ＤａｉＹｏｎｇｊｉｕ（戴永久）ａｎｄＸｕｅＦｅｎｇ（薛峰...     

水下爆破技术在马家泵站工程中的应用

介绍了马家泵站工程水下爆破参数的设计和施工工艺,以及所取得的经验和体会。     

Estimating Radon Flux and Environmental Radiation Dose from Decommissioning Uranium Mill Tailings and Mining Debrisg

Ｍｉｌｔａｉｌｉｎｇｓａｒｅｔｈｅｍａｊｏｒｓｏｌｉｄｗａｓｔｅｒｅｓｉｄｕｅｓｆｒｏｍｕｒａ－ｎｉｕｍｍｉｎｉｎｇ．Ｉｔｈａｓｂｅｅｎｐｒｅｄｉｃｔｅｄ（ＩｎｔｅｒｎａｔｉｏｎａｌＡｔｏｍｉｃＥｎ－ｅｒｇｙＡｇｅｎｃｙ,１９９４）ｔｈａｔａｂｏｕｔ...     

Estimating Radon Flux and Environmental Radiation Dose from Decommissioning Uranium Mill Tailings and Mining Debris

Based on a case study on uranium mine No.765 of China National Nuclear Corporation (CNNC), the paper briefly describes disposal program and effect of decommissioning uranium mine/mill facilities and quantitatively evaluates radon fluxes and doses to man of gaseous airborne pathway from mill tailings and mining debris before and after decommissioning, including annual individual effective dose to critical groups and annual collective effective dose to the population within 80 km region of the facilities.     

地下水与玄武财反应趋势分析

通过建立水化学平衡反应模型,计算地下水组分的各种可能存在形式的浓度和活度,并求得各种矿的饱和指数,再用饱和指数分析水－岩相互作用过程中矿物的溶解与沉淀反应趋势。本文采用该方法对盱眙玄武岩土区水－岩间反应趋势进行了分析。     

湘西南石英脉型金矿水-岩反应与锶、氢、氧同位素的关系

同位素方法已广泛用于矿床成因研究：确定矿床的形成年代,研究含矿热液的来源和地质过程。但是针对具体矿床,这方面研究仍存在许多不确定性或多解性。湘西南石英脉型金矿的成矿流体来源,是一个颇有争议的问题,有人认为成矿流体主要有变质水,后期可能有大气降水加入［...     

The Project for Intercomparison of Land-surface Parameterization Schemes (PILPS) phase 2(c) Red-Arkansas River basin experiment:: 2. Spatial and temporal analysis of energy fluxes

The energy components of sixteen Soil-Vegetation Atmospheric Transfer (SVAT) schemes were analyzed and intercompared using 10 years of surface meteorological and radiative forcing data from the Red-Arkansas River basin in the Southern Great Plains of the United States. Comparisons of simulated surface energy fluxes among models showed that the net radiation and surface temperature generally had the best agreement among the schemes. On an average (annual and monthly) basis, the estimated latent heat fluxes agreed (to within approximate estimation errors) with the latent heat fluxes derived from a radiosonde-based atmospheric budget method for slightly more than half of the schemes. The sensible heat fluxes had larger differences among the schemes than did the latent heat fluxes, and the model-simulated ground heat fluxes had large variations among the schemes. The spatial patterns of the model-computed net radiation and surface temperature were generally similar among the schemes, and appear reasonable and consistent with observations of related variables, such as surface air temperature. The spatial mean patterns of latent and sensible heat fluxes were less similar than for net radiation, and the spatial patterns of the ground heat flux vary greatly among the 16 schemes. Generally, there is less similarity among the models in the temporal (interannual) variability of surface fluxes and temperature than there is in the mean fields, even for schemes with similar mean fields.