Pre- and Post-Construction Assessment of Nutrient Concentrations at Shallow Water Habitat Restoration Sites on the Lower Missouri River

Loss of shallow water habitat (SWH) is hypothesized as a factor contributing to the decline of native Missouri River fishes, including the endangered pallid sturgeon. As a result, the restoration of SWH is a high priority in this large river system. Restoration activities often include constructing side channel chutes;however, limited information exists on the potential negative, unintended effects of chute construction activities on water quality. This study was designed to better understand the possible effects of chute construction, both initially and as chute development continues, on Missouri River nutrient concentrations. Our first objective was to determine if the addition of sediment from proposed chute locations to river water samples (i.e., elutriate samples) increased nutrient concentrations relative to water-only river samples collected just upstream of the proposed chute locations or river water samples collected from eight long-term water quality monitoring stations. Our second objective was to determine if nutrient concentrations of river samples monitored during 2009 and 2010 increased after water passed through previously-constructed chutes. Nutrient concentrations of elutriate samples were not significantly higher than river water samples collected just upstream of the proposed chute locations;the same was true for Missouri River water samples collected from seven of eight long-term water quality monitoring stations. Furthermore, monitoring of nutrient concentrations collected from water samples at the outlet of previously-constructed chutes were not significantly higher than water samples collected at the upstream inlet of these chutes. Our results suggest that individual SWH chute construction projects designed to restore some of the natural form and function of the Missouri River are unlikely to significantly increase Missouri Rivernutrient concentrations initially or as these chutes continue to develop.

成语from Missouri小考

from Missour 系美国成语。据《韦氏新世界美国英语词典》,from Mis-souri 的英语释义是:not easily convinced;skeptical until shown definite proof意即“不轻信”,“获得确凿的证据才相信”。那么 from Missouri 为什么可以解释成“不轻信”呢?这还得从美国的一段历史谈起。密苏里州首创了挑选法官的《密苏里法》(Missouri Plan),后来被其他各州采用。其办法是设立一个提名委员会,由它筛选法官候选人,向任命机关(例如州长)提交候选名单。被任命机关选中担任法官职务的人试用期满后。

Simulations of a Persistent Heat Wave Event in Missouri in Summer 2012 Using a High-Resolution WRF Model

An extreme and persistent heat wave event hit Missouri in summer 2012.Current operational forecast models failed to predict such an event at a long lead.The objective of the current study is to simulate this extreme event using a high-resolution Weather Research and Forecasting(WRF)model with eight combined physical(including longwave/shortwave radiation,microphysics,and planetary boundary layer)parameterization packages.Integrated for one month,the model successfully simulates the spatial pattern and temporal evolution of surface air temperature,compared to in-situ observations.The interesting feature is an oscillatory development of the surface air temperature,with a pronounced synoptic timescale.Such a temperature evolution is consistent with the local zonal wind fluctuation,implying the important role of anomalous temperature advection.An overall skill score that combines the performance of 2-m air temperature,relative humidity,and precipitation fields is defined.The result shows that the combination of Thompson,Rapid Radiative Transfer Model for GCMs(RRTMG),and Mellor–Yamada–Nakanishi–Niino level-3(MYNN3)schemes presents the best WRF simulation.A further analysis of this best simulation shows that the model successfully reproduces the urban heat island(UHI)effect in the Kansas City Metropolitan Area with realistic diurnal variation of 2-m air temperature in the urban and nonurban areas with a larger UHI effect at nighttime.

高校参与农村教师培训的范例——美国密苏里州教育更新区计划述评

面对2000年以来,农村学校教师严重短缺、师资水平低下和教师专业发展落后的状况,美国农村学校和社区联合会以密苏里州为模本,从2001年起进行了为期5年的教育更新区(ERZ)计划。该计划以高等教育机构为中心,联合全州的教师和技术支持组织,希望建立一个解决农村教师供给、培训方面问题的长效机制,充分利用现代技术促进农村教师专业发展,通过各方的广泛参与,更新农村教师教育,提高农村教育教学质量。

华南植物园与世界一流植物园的比较研究

植物园在植物科学研究、生物多样性保护和植物资源可持续利用中具有重要作用,也是公众教育和知识传播的重要平台,具有文化传承和历史延续性的功能。以中国科学院华南植物园、英国皇家植物园邱园和美国密苏里植物园为例,从物种保护、科学研究和科学传播3个方面对植物园进行了全面的比较和分析,为华南植物园未来发展提出了一些建议,可为华南植物园乃至我国植物园的发展提供参考依据。

Analyzing Anomalous Topographic Map Drainage System and Landform Evidence as a Glacial History Paradigm Problem: A Literature Review

While not usually stated, detailed topographic maps show well-mapped anomalous drainage system and other erosional landform evidence the accepted North American Cenozoic geologic and glacial history paradigm (accepted paradigm) does not permit geomorphologists to satisfactorily explain. A new and fundamentally different paradigm able to explain the drainage system and other erosional landform evidence has recently emerged, but requires what the accepted paradigm considers to be the preglacial (and probably mid-Cenozoic) Bell River drainage system to have formed on a melting continental ice sheet’s floor. The new paradigm’s melting ice sheet had previously eroded bedrock underneath it and caused crustal warping that raised continental regions and mountain ranges so as to create and occupy a deep “hole” while massive and prolonged meltwater floods flowed across rising continental regions and mountain ranges to the south. The new paradigm leads to a completely different middle Cenozoic geologic and glacial history than the accepted paradigm describes and the two paradigms are analyzed according to good science expectations such as using evidence anyone can see, applying common sense logic during each research step, producing consistent results, and simplicity of paradigm generated explanations. The new paradigm uses topographic map evidence anyone can see, appears to use common sense logic during each research step, and produces remarkably consistent results leading to a simpler Cenozoic northern Missouri River drainage basin region geologic and glacial history than what the accepted paradigm describes. Further work is needed to test the new paradigm’s ability to explain drainage system and erosional landform evidence in other geographic regions such as in the Ohio River drainage basin.

美国高校终身教职运行机制的特点及争论探析--以东南密苏里州立大学为例

美国高校终身教职制度的多元文化认同让教师获得了更多的话语权和自主性,实现了教师的学术自由和职业安全,并在创新和推动社会进步中发挥积极作用。以东南密苏里州立大学为例,终身教职运行机制充分体现了严肃性、公正性与包容性等特点。同时,由于委员会成员的主观局限性以及管理的不完善对招聘和晋升过程的消极影响亦可能导致失败的结果,如何解决终身教职聘后的个人发展和科研能力的继续提升以及完善聘后评估制度等争论,也是需要思考的。从长远看,高校亟需寻求更加科学合理的改革措施以消除现有机制的弊病而使之趋于完善。

通过教师评价引领教师走向卓越——美国密苏里州《中小学示范教师标准》述评

经过数十年的发展,美国密苏里州形成了成熟完善的教师评价系统。2013年5月,密苏里州正式颁布了《示范教育工作者评价系统》,《中小学示范教师标准》是该评价系统的基础和核心。本文分析了《中小学示范教师标准》出台的背景与过程,阐述其内容与结构,总结、归纳了其特色,以期对我国教师评价的发展有所帮助。

Origin of Mountain Passes across Continental Divide Segments Surrounding the Southwest Montana Big Hole and Beaverhead River Drainage Basins, USA

The evolution of southwest Montana’s Big Hole and Beaverhead River drainage basins is determined from topographic map evidence related to mountain passes crossing what are today high altitude drainage divides including North America’s east-west Continental Divide. Map evidence, such as orientations of valleys leading away from mountain passes (and saddles) and barbed tributaries found along the downstream drainage routes, is used to reconstruct flow directions of streams and rivers that once crossed the present-day high mountain divides. Large south-oriented anastomosing complexes of diverging and converging channels are interpreted to have eroded what are today closely spaced passes and saddles now notched into high mountain ridges. Water in those south-oriented channels is interpreted to have flowed across emerging mountains and subsiding basins. Headward erosion of deeper southeast-oriented valleys, assisted by crustal warping, concentrated south-oriented water in fewer and deeper valleys as the water flowed from southwest Montana into what are today Idaho and the Snake River drainage basin. Headward erosion of the Big Hole River valley between the emerging Anaconda and Pioneer Mountains, also assisted by crustal warping, reversed all Big Hole Basin drainage so as to create the north-, east-, and south-oriented Big Hole River drainage route. A final and even more major reversal of flow in the present-day north-oriented Montana Missouri River valley, with the assistance of additional crustal warping, next ended all remaining flow to Idaho and the Snake River drainage basin and reversed and captured all drainage in the present-day north-oriented Big Hole, Beaverhead, and Red Rock River drainage basins. The observed map evidence indicates that prior to the final flow reversal events, large volumes of south-oriented water flowed across southwest Montana’s Big Hole and Beaverhead River drainage basins.

Analysis of Mountains Passes along the East-West Continental Divide and Other Drainage Divides Surrounding the Boulder River Drainage Basin, Jefferson County, Montana, USA

Detailed topographic maps of drainage divides surrounding the Jefferson County, Montana, Boulder River drainage basin were analyzed to determine the nature of drainage systems that preceded today’s Boulder River drainage system and how the Boulder River drainage system evolved from those earlier drainage systems. The Boulder River studied here drains in a north, east, and south direction to the Jefferson River, which at Three Forks, Montana joins the north-oriented Madison and Gallatin Rivers to form the north-oriented Missouri River. The North American east-west Continental Divide surrounds the Boulder River drainage basin western half and mountainous drainage divides with the Jefferson and Missouri Rivers surround the drainage basin’s eastern half. More than 25 deep mountain passes are notched into these drainage divides and provide evidence of the regional drainage system that preceded the present day Boulder River drainage system. Analysis of pass elevations and of orientations of valleys leading in opposite directions from those mountain passes shows that prior to Boulder River drainage system development immense volumes of south-oriented water moving in anastomosing complexes of diverging and converging channels flowed across the Boulder River drainage basin area and that the Boulder River drainage system evolved as deeper channels progressively captured flow from shallower channels. While not documented in detail crustal warping probably raised Boulder River drainage basin areas relative to adjacent valleys and basins as capture events took place. A water source was not determined, but may have been from a large North American continental ice sheet, although Boulder River drainage basin evolution probably occurred while mid Tertiary sediments were filling adjacent valleys and basins.

中美高等教育交流与中国大学新闻学教育——以沃尔特·威廉和燕京大学新闻学系为考察中心

近代中国大学新闻学教育是在中美高等教育交流日益频繁的过程中创立和发展起来的。特别是美国新闻学创始人沃尔特·威廉五次来华讲学、其扶植重建燕京大学新闻学系及其门生移植"密苏里模式",直接而有力地推动了近代中国大学新闻学专业的建设和发展,在中美高等教育交流史上树立了一个成功的范例。今天,回顾和追述这段尘封的历史,不仅可为当前我国大学新闻学专业的改革和发展提供有益的借鉴,而且对进一步促进21世纪中美高等教育的交流也不无启示。

Upper Sun River Drainage Basin Origin Determined by Topographic Map Interpretation Techniques: Lewis and Clark and Teton Counties, Montana, USA

A new and fundamentally different regional geomorphology paradigm in which massive south- and southeast-oriented meltwater floods flowed across the entire Missouri River drainage basin is tested by interpreting detailed topographic maps of the Montana upper Sun River drainage basin region by trying to explain origins of previously unexplained or poorly explained erosional landforms located upstream from Sun River Canyon (which cuts across Montana’s north-to-south oriented Sawtooth Range). Mountain passes, through valleys, and other drainage divide low points along what are today high mountain ridges, including the North American east-west continental divide, are interpreted to be evidence of drainage routes that once crossed the region. These drainage divide crossings suggest that prior to erosion of present-day upper Sun River drainage basin valleys, massive floods moved in south directions across what are today the north-oriented Middle and South Fork Flathead River drainage basins into today’s upper Sun River drainage basin area and carved a complex of diverging and converging channels into what was probably a low relief surface now represented by the crests of the region’s highest mountain ridges. Further, the map evidence shows how a diverging complex of south- and southeast-oriented upstream Sun River drainage basin flood flow channels changed flow direction to cross the Sawtooth Range in a northeast direction before converging on the Montana plains at a location downstream from Sun River Canyon. The observed upper Sun River drainage basin area topographic map evidence is consistent with the new geomorphology paradigm predictions, in which massive south-oriented meltwater floods flowing across the rising rim of a continental ice sheet created deep “hole” (created by deep ice sheet erosion and ice sheet weight caused crustal warping) are diverted to flow in northeast and north directions into and across deep “hole” space being opened up by ice sheet melting.

美国密苏里州中小学教师绩效评价的主要经验及启示

本文论述了美国密苏里州中小学教师绩效评价推行的背景和主要做法。简析了美国密苏里州中小学教师绩效评价目的、教师绩效评价内容、教师绩效评价实施过程,并从中探寻对我国中小学教师评价改革与研究的有益启示。

中美高校本科生“生物化学”教学的比较分析——以海南大学和美国密苏里州立大学为例

通过参加海南大学组织的"国际化双语教学培训项目",观摩了美国密苏里州立大学本科生"生物化学"课程.以海南大学药学专业本科生"生物化学"课程为例,比较分析了中美两国高校在"生物化学"课程的教学安排、教学方法、考核方式等方面的差异,为国内高校本科生"生物化学"教学改革提供参考与借鉴.

论《反垄断法》的解释及适用范围 美国跨密苏里案及其启示

尽管我国《反垄断法》立法框架与欧盟更为近似,但其制定、解释和实施仍受到美国经验的深刻影响。在进行域外经验借鉴时,往往仅注重规则的简单趋同,而忽视制度发展阶段的匹配性和制度预设市场前提的差异性。跨密苏里案(1897)是《谢尔曼法》颁布后的早期案例之一。该案中,联邦最高法院就《谢尔曼法》的适用范围和解释进行了首次激烈争锋。虽然时隔100余年,但由于我国正处于《反垄断法》实施初期,处于案件的相似阶段,该案对我国《反垄断法》实施具有重要的启示意义:在《反垄断法》的解释中,应特别注意文义解释与历史解释的合理运用;在界定《反垄断法》与行业管制法的关系时,应明确整体上二者相互补充,并行不悖;当存在具体法条竞合时,应适用特别法优于一般法的规则。

田纳西·威廉斯与兰福德·威尔逊作品的二元要素解读

以田纳西·威廉斯兰福德·威尔逊作品背景为出发点,以"十字路口"为喻,通过对比两人作品中的"南北与东西"、"掠夺与守护自然"、"外乡人与本地人"等几对二元要素,揭示出这些要素对剧作家在刻画人物、突出主题以及体现美国价值观等方面产生深刻的影响。

Importance of Bromine-Substituted DBP’s in Drinking Water

Significant fractions of bromine-substituted disinfection byproducts (DBPs)—particularly trihalomethanes (THMs)— have been observed to form during treatment of water from the Missouri River. THM speciation was also noted to follow a seasonal pattern during a 2.5-year period, during which samples were collected multiple times per month. Although some treatment processes were effective at reducing the chloroform formation potential, no treatment used at this utility significantly reduced the formation of the three bromine-substituted THM species. Using chloramination rather than free chlorination for secondary disinfection, however, was effective at limiting increases in the concentration of all four regulated THM species in the distribution system.

Characterizing Lake Bottom Sediments Using Marine Geophysical Tools

Missouri is a state with rich karst terrain. Geotechnical evaluation of foundation design for bridges and dams requires an understanding of the characteristics of subsurface geological environment, including sediments, bedrock and benthic habitat. It is crucial that the community empowers itself with the knowledge of the karst system’s characteristics in order to potentially use it as a source of water and drainage, but also to avoid the disaster of building constructions too close to vulnerable land on top of massive karst caverns. Electrical resistivity tomography profiling (underwater cables), and continuous resistivity profiling (towed cable) surveys were conducted to characterize the lake sediments (rock and soil) beneath the man-made Little Prairie Lake, in Central of Missouri State, United States. Electrical resistivity (with marine cables and towed cable) was used to determine variability in the lithology and thickness of sediments (soil and rock) beneath the lake with conjunction of echo sounder in order to calculate water depth. Side scan sonar was used to map the variations in the lithology/nature of exposed lakebed sediments and to locate the potential hazard of trees. On land, electrical resistivity tomography was used with multi-channel analysis of surface wave method to determine sediments, joints, and the depth of bedrock. Analyses of the acquired data revealed the location and orientation of the original stream channels (prior to the construction of the earth fill dam). Underwater electrical resistivity tomography and continuous resistivity profiling determined joints, sediments, and bedrock underneath water bodies. Integrated marine geophysical tools help to evaluate the subsurface prior to any construction project (dam or bridge), are useful in determining the characteristics of lithology (fractured rock, intact rock and soil), and make it possible to map benthic habitat and the submerged potential hazards of trees on the lakebed as well as accurately measuring water depth.

Agent Orange Chemical Plant Locations in the United States and Canada: Environmental and Human Health Impacts

During the Vietnam War, millions of liters of six tactical herbicides were sprayed on the southern Vietnam landscape to defoliate forests, to clear military perimeters and to destroy enemy food supplies. The environmental and human health impacts of spraying these herbicides, especially Agent Orange and those formulated with mixtures that included 2,4,5-trichlorophenoxyacetic acid (2,4,5-T) which was contaminated with 2,3,7,8-tetracholorodibenzo-p-dioxin (TCDD) have been documented over the last 60 years. The dioxin TCDD clean-up efforts at former military bases and other Vietnam hotspots are ongoing. However, the lesser-told story was the environmental and human health impacts on the communities and chemical plant workers who manufactured Agent Orange and other herbicides that became contaminated with dioxin TCDD in the manufacturing processes at seven locations in the United States and one site in Canada. The pollution at these chemical plant sites, adjacent rivers and groundwater is well known within each affected state or province but not widely recognized beyond their localities. In this paper we assess the national long-term effects on land, groundwater and river resources where Agent Orange and other agricultural herbicides containing 2,4,5-T with unknown amounts of dioxin TCDD were manufactured, transported, and temporarily stored. The sites where residual tactical herbicides with contaminated by-products were applied to public lands or disposed of by military and civilian workers within the United States and Canada are identified. After 60 years, these communities are still paying the price for the U.S. Government, DOD and USDA decisions to provide and use agricultural herbicides as tactical chemical weapons during the Vietnam War (1962-1971). There have been human health issues associated with the chemical manufacture, transport, storage and disposal of these herbicides related to workers who moved these chemical weapons from United States and Canada to SE Asia. Most of these dioxin contaminated tactical herbicides were transported via railroads to ports at Mobile, Alabama and Gulfport, Mississippi. They were then loaded on ocean-going ships and transported via the Panama Canal for use during the Vietnam War. The objective of this study is to document the environmental and human consequences of the manufacture of tactical herbicides with dioxin TCDD and arsenic on the chemical plant, transportation, application, storage and disposal workers. The costs of cleanup of these North America chemical plant sites, transportation corridors, temporary and long-term storage areas, supply chain storage facilities with residual tactical herbicide, application, and disposal sites to date, is in the billions of dollars. Billions have been spent on hazardous waste incineration to destroy the dioxin TCDD or bury it in certified landfills. Government mandated environmental covenants are on titles of properties still contaminated with high levels of dioxin TCDD. If landowners attempt to rescind land use restrictions, many more billions of dollars will be needed to finish the environmental cleanup and restore natural resources. These cost estimates do not include the billions of dollars needed to treat the effects of dioxin TCDD exposure of U.S. and Canadian civilian workers who manufactured and handled these contaminated herbicides during the Vietnam War as well as address human health issues of their offspring.

美国密苏里植物园内的中国园景观评析

美国密苏里植物园不仅是美国最古老的植物园,也是世界著名三大植物园之一。笔者从平面和建筑设计、小品和铺装设计以及植物配置等角度对密苏里植物园中的中国园进行了景观研究与分析,以期对国内植物园景观营建提供一定的参考。