井下废弃疏供水设施的水闸墙壁后注浆处理方法——以赵各庄矿七水平北水洞为例

针对煤矿井下浅部输供水设施随采深加大而废弃的问题,以赵各庄矿七水平北水洞为例,论述了处理废弃疏供水设施和封堵高压奥灰水的方法及实施步骤。该项工程通过在高压动水条件下对水闸墙墙体进行壁后高压注浆,实现了赵各庄矿废弃七水平北水洞的高效和经济处理,可供类似矿井借鉴。     

2000 ans de colmatage du port antique de Fréjus (Forum Julii), France : une double métamorphose littorale

The ancient harbour of Fréjus, located in a Holocene ria, has been the subject of a research program in archaeology and, notably with regards to the sedimentary environment at its foundation. A core was extracted in the middle of the basin of Fréjus harbour. The objective is to understand the paleogeographical evolution of the pre-harbour and Roman harbour environments. The sedimentological and biostratigraphical proxies enabled us to: (1) confirm Texier's (1849) hypothesis in which the pre-harbour environment comprised a marine bay blocked by an artificial quay (Gébara and Morhange, 2010). Excoffon et al., 2006 and Devillers et al., 2007, demonstrate the presence of a rocky coast (butte Saint-Antoine), at the time of the harbour's foundation, which it has been progressively transformed into a sandy coast due to the sedimentary input of Argens delta. This study permitted: (2) to confirm the date of foundation of Fréjus’ harbor; and (3) to show different phases of protection. Indeed, the harbour facies attests to a euryhaline lagoon (B1 and B3) which was gradually transformed into a freshwater lake (B4) due to the progradation of the Argens. Low sedimentation rates (ca. 0.5 mm/year), between the end of the last century BC until seventh century AD is consistent with the dredging of the harbour basin.     

Monitoring of impact of anthropogenic inputs on water quality of mangrove ecosystem of Uran,Navi Mumbai,west coast of India

Surface water samples were collected from substations along Sheva creek and Dharamtar creek mangrove ecosystems of Uran (Raigad), Navi Mumbai, west coast of India. Water samples were collected fortnightly from April 2009 to March 2011 during spring low and high tides and were analyzed for pH, Temperature, Turbidity, Total solids (TS), Total dissolved solids (TDS), Total suspended solids (TSS), Dissolved oxygen (DO), Biochemical oxygen demand (BOD), Carbon dioxide (CO₂), Chemical oxygen demand (COD), Salinity, Orthophosphate (O-PO₄), Nitrite–nitrogen (NO₂–N), Nitrate–nitrogen (NO₃–N), and Silicates. Variables like pH, turbidity, TDS, salinity, DO, and BOD show seasonal variations. Higher content of O-PO₄, NO₃–N, and silicates is recorded due to discharge of domestic wastes and sewage, effluents from industries, oil tanking depots and also from maritime activities of Jawaharlal Nehru Port Trust (JNPT), hectic activities of Container Freight Stations (CFS), and other port wastes. This study reveals that water quality from mangrove ecosystems of Uran is deteriorating due to industrial pollution and that mangrove from Uran is facing the threat due to anthropogenic stress.     

Assessing drought threats to agricultural water supplies under climate change by combining the SWAT and MODSIM models for the Geum River basin,South Korea

ABSTRACT

The impacts of future climate change on the agricultural water supply capacities of irrigation facilities in the Geum River basin (9645.5 km²) of South Korea were investigated using an integrated modeling framework that included a water balance network model (MODSIM) and a watershed-scale hydrologic model (Soil and Water Assessment Tool, SWAT). The discharges and baseflows from upland drainage areas were estimated using SWAT, and the predicted flow was used to feed agricultural reservoirs and multipurpose dams in subwatersheds. Using a split sampling method, we calibrated the daily streamflows and dam inflows at three locations using data from 6 years, including 3 years of calibration data (2005–2007) followed by 3 years of validation data (2008–2010). In the MODSIM model, the entire basin was divided into 14 subwatersheds in which various agricultural irrigation facilities such as agricultural reservoirs, pumping stations, diversions, culverts and groundwater wells were defined as a network of hydraulic structures within each subwatershed. These hydraulic networks between subwatersheds were inter-connected to allow watershed-scale analysis and were further connected to municipal and industrial water supplies under various hydrologic conditions. Projected climate data from the HadGEM3-RA RCP 4.5 and 8.5 scenarios for the period of 2006–2099 were imported to SWAT to calculate the water yield, and the output was transferred to MODSIM in the form of time-series boundary conditions. The maximum shortage rate of agricultural water was estimated as 38.2% for the 2040s and 2080s under the RCP 4.5 scenario but was lower under the RCP 8.5 scenario (21.3% in the 2040s and 22.1% in the 2080s). Under the RCP 4.5 scenario, the projected shortage rate was higher than that during the measured baseline period (1982–2011) of 25.6% and the RCP historical period (1982–2005) of 30.1%. The future elevated drought levels are primarily attributed to the increasingly concentrated rainfall distribution throughout the year under a monsoonal climate, as projected by the IPCC climate scenarios.

EDITOR Z.W. Kundzewicz; ASSOCIATE EDITOR not assigned     

Transnational Urbanism in Port of Spain: Returning Middle-Class Urban Elites

Port of Spain, Trinidad offers an ideal context in which to analyze pre-retirement return migration to a Global South urban realm, expanding transnational urban research beyond the conventional focus on Global North metropolitan destinations. In this article, we draw on the transnational narratives of a selected sample of relatively youthful Trinidadians, who have spent many years abroad acquiring education and professional experience, but who have then decided to return in mid-career to the capital region of the island nation of their birth, or of their parent(s). Theoretically, we position these returning professionals as members of a "middling" transnational urban class whose return is at least partly motivated by a desire to "make a difference." Our results contribute to a growing literature that documents the role of transnational middle-class urban elites returning elsewhere in the Carribbean: "middling" transnational urbanism is reshaping key facets of urbanization in the Global South.     

有限元分析技术在空间太阳望远镜结构设计中的应用

有限元分析技术是现代工程领域中进行结构分析的一种数值方法，已经广泛应用于天文仪器设计。它可使设计者了解被设计对象相应的特性，发现强度或刚度等方面的薄弱点，从而改进和优化设计。以空间太阳望远镜主桁架和主镜室的设计为例，从几何建模、单元划分入手，对静力学分析、模态分析、动态响应和热分析等各方面在空间太阳望远镜设计中的应用进行了阐述；分析了有限元分析存在的误差、产生的原因以及如何减少误差；叙述了有限元分析技术应用于天文仪器尤其是空间天文仪器的发展趋势。     

基于IE-Web Service邮件收发系统的设计与实现

介绍了如何在客户端通过IE控件远程调用Web服务以及在服务器端如何用JavaMail完成Web服务的邮件收发功能.从而实现一种完全基于HTML,Web服务技术架构的,采用SOAP通讯协议的邮件收发系统.     

昆明VLBI观测站终端控制软件的设计

针对昆明VLBI观测站终端设备(S3数据采集系统)的特殊性,设计在标准的终端控制计算机(Field System)上能够控制相应硬件设备的软件.S3数据采集系统包括SX接收机、中频分配器、视频转换器、时延计数器、噪声控制开关和气象数据自动采集仪.设计过程中,考虑到软件的可读性和可维护性,各种设备分别用相应的子函数来完成具体功能,各子函数由主程序调用.在完成程序安装后,经测试能与S3数据采集系统进行良好的通讯,达到控制各硬件设备的目的及满足实际测控工作的需要.     

当代光学天文望远镜控制系统新技术

对当代光学天文望远镜控制系统技术之进展进行了综述，同时也对这一领域的未来发展作了一些预测，以期给这一领域的控制工程师们提供一个与他们专业需要有关的概貌。     

多距离模式的长沙某医院服务范围空间分析

对长沙市某医院2016年1~3月份的就诊患者地址数据进行地理编码及可视化处理,采用欧式距离、曼哈顿距离、道路距离、最短行驶时间方法分析不同距离模式下患者到该医院就医的空间分布状况;另外,结合分位数评价指标定量分析3种距离模式下服务半径和服务面积的异同以及影响该医院服务范围的因素,分析得到该医院的服务范围呈中心辐射状,主要服务半径较小(约8 km),服务辐射范围在150 km~2以内,且受距离成本、时间成本和地形要素影响明显。