长江中游荆江河段绿色航道建设的实践与思考

回顾了长江中游荆江河段航道整治工程生态航道建设的主要内容、初步成效和基本经验,梳理了工程的环境制约问题及其解决思路,在此基础上提出了进一步建设长江绿色航道的若干建议,为长江航道绿色发展提供参考.     

2021年长江荆江河道再查勘与治理新认识

对长江荆江河道进行了再查勘,初步提出了河势变化、崩岸护岸、河道治理、岸线利用以及航道航运等荆江治理的新认识与对策建议.荆江河床仍处于剧烈演变之中,洞庭湖口侵蚀基准面作用不断增强;上荆江岸线近期有停止崩塌甚至出现淤积的变化趋势,下荆江出现同一洲滩岸线崩塌与淤积分界现象;荆江护岸与护滩作用与效果十分有限,荆江"调整河床"治理措施的实施与研究有待加强;荆江岸线利用工程普遍存在利用率不高和侵占河道严重等问题,建议实行岸线利用工程数量与长度总量控制;三峡—葛洲坝船闸"压船"问题十分严重,初步构思的"三峡—荆江新运河航道"具有航运、水资源利用与防洪等综合功能和效益.荆江治理是长江治理保护的重要内容,具有样板与示范效应;建议持续加强荆江河道监测与科学研究,密切关注荆江河势演变与治理保护.     

基于"四大家鱼"生境水力学指标的戴家洲河段航道工程生态效应模拟研究

长江中下游是"四大家鱼"(青鱼、草鱼、鲢鱼、鳙鱼)的主要产卵场和育幼场.近年来实施了大量的航道工程,虽产生了较好的生态效果,但仍不清楚航道工程与四大家鱼生境水力学指标的互馈关系.以长江中游戴家洲河段为对象,建立了"四大家鱼"产卵适宜性数学模型,模拟研究航道工程实施前后"四大家鱼"产卵生境水力学指标的变化.结果表明:戴家洲河段"四大家鱼"产卵的最佳流量区间为17500～22000m3/s;戴家洲河段航道工程的实施,为"四大家鱼"栖息创造了更多的生境空间;枯水期出露的心滩(池湖港心滩),在枯水流量下HSI和WUA均减小,中枯水及以上流量HSI和WUA均增大;枯水期未出露的低滩(戴家洲洲头低滩),工程实施后HSI和WUA均增大,为"四大家鱼"产卵及栖息提供了更多的生境空间;低矮且存在窜沟的边滩(乐家湾边滩),护滩工程的实施限制了窜沟发育,工程实施后"四大家鱼"HSI、WUA均减小.     

新形势下长江中下游干流河道治理思路探讨

长江中下游干流河道治理事关长江经济带的防洪安全和经济社会发展大局。在回顾长江中下游干流河道治理历程及思路转变的基础上,分析了干流河道治理存在的主要问题、面临的新形势与新需求,探讨了新形势下长江中下游干流河道治理的思路。长江中下游干流河道治理核心在于治水,后续应在塑造优良河势的基础上,构建泄洪通道、黄金航道、经济廊道、生态通道、文化通道等五大战略通道。     

长江水资源保护与利用技术方略

水利科学技术发展和创新是长江大保护与长江经济带高质量发展的重要引擎.本文剖析了新时期长江水资源保护与利用科技发展面临的机遇和挑战,建立长江水资源保护与开发技术评价方法,评估现有关键技术水平并追踪当前热点和未来发展趋势.从水资源节约保护、水环境改善优化、水生态保护修复和水灾害风险防控等多目标协同治理角度,梳理相关研究成果...     

长江河道砂石资源经营管理模式研究

分析了长江河道砂石资源及其经营管理特点,并结合长江河道采砂管理的实践经验,对长江流域现有两种采砂许可方式进行了利弊分析,提出政府统一经营管理下的"采、运、销"分离模式.该模式按照"统一组织领导、统一开采经营、采收销分离、统一综合执法、统一利益分配"原则进行砂石资源经营管理,具有明显的生态效益、社会效益和经济效益,为改进...     

长江下游地区生态环境监督管理工作实践研究

针对长江下游地区化工业密度高、水污染环境风险突出的特点,结合以往实践经验,从省界缓冲区监督管理、入河排污口监督管理、饮用水水源地保护等方面,探讨长江下游地区在生态环境监督管理工作中存在的问题,并有针对性地提出建议,对我国流域生态环境监督管理有一定的现实意义和参考价值.     

再论三峡库区旅游地空间的变动与重构——对《论三峡库区旅游地空间的变动与重构》的检验与发展

文章在梳理总结现有三峡旅游地空间结构研究的基础上,以2003～ 2009年三峡旅游地15区县的国内游客数和国内旅游收入数据为基础,运用位序—规模律对空间结构的变动进行了量化研究.文章发现,三峡旅游地总体上已经从空间极化阶段向均衡阶段转变,旅游产品变化、旅游交通完善和政府主导的跨区旅游企业整合等是影响空间重构的主要因素,并还将持续发挥影响.目前三峡旅游地已经形成了以万州和宜昌(夷陵—秭归)为组织核心,东段以三峡大坝—巫山—奉节为主要旅游吸引物,长江主航道、沪蓉、沪渝高速为主要轴线的旅游空间结构,但西段旅游组团的核心由丰都转为武隆,更多地表现为重庆都市圈旅游的特点,旅游空间结构的“东西分化”趋势明显;并有沿大宁河、神农溪等跨区旅游合作轴线向神农架和恩施州南北扩张的趋势.     

绿色金融、技术创新与绿色发展效率——以长江经济带城市为例

基于2006—2019年长江经济带107个地级及以上城市的面板数据,采用双向固定效应模型探究绿色金融对绿色发展效率的影响。结果表明:(1)绿色金融能够显著提高绿色发展效率;(2)绿色金融对长江经济带不同地区绿色发展效率的影响大小表现出地区异质性,表现为长江下游(0.628 8)>长江中游(0.454 1)>长江上游(0.380 2);(3)技术创新在其中起到部分中介效应,效应大小为11.81%。基于上述研究结论,提出建议:(1)继续扩大绿色金融政策的覆盖面,鼓励企业加大研发投入力度,进行技术创新;(2)限制污染企业发展,加强对绿色金融和技术创新的信息披露和监管,提高绿色发展效率;(3)提高绿色金融资本的流动性,绿色金融政策应向欠发达地区倾斜。     

鲁菜中的孔氏风味

黄河流域的鲁菜与长江上游的川菜、长江下游的淮扬菜、珠江流域的粤菜,合称中国的四大菜系。 黄河流域是中华民族的摇篮。这里丰富的资源、发达的经济和灿烂的文化,给鲁菜的产生提供了物质和社会基础,使它在历史的长河中得到了长足的发展,逐渐形成了自己独特的风     

Sources of Slavery-Destinations of Slavery

Summary

This study seeks to account for differences between the UK and US in including sites of black slavery as part of their heritage tourism and museum agenda. Both countries were heavily involved in the slave trade and both currently have immigrant communities with an appreciation of their origins. However, and unlike the American situation, it is only recently that Britain has opened the contentious issue of slavery to public gaze. In this regard, attention focuses specifically on the mounting of a pioneering Slave Exhibition at Liverpool's Maritime Museum and, by interviewing its chief curator, various insights are gained as to the potential and pitfalls of such a permanent display of an inglorious past. Further interpretation is added by references to the general literature on heritage tourism, the emerging context of “thanatourism” and the framework of a Force Field model that can usefully accommodate the competing interests of rival stakeholders.     

社会学框架下的旅游学学科属性定位分析

本文在假设旅游学是一门独立学科这一前提下，借用社会学关于学科属性定位的分析框架，对旅游学的学科属性进行定位分析。从学科的认知维度来看，旅游学是一门“应用”性较强的“软”学科；从学科的组织维度来看，旅游学是一门“分野度”较高而“城市化度”较低的学科。旅游学学科的这些属性的确定。为我们解释旅游学发展现状提供了基本依据。能够使我们明确旅游学的发展阶段、发展方向以及应注意的问题，这对于旅游学学科建设具有重要意义。     

上刀山的傈僳族姑娘

坐落在中缅边境高黎贡山高寒山区的轮马村是一个傈僳族聚居村,全村共有320户人家.这个村子的男女老少以刀山敢上、火海敢下的绝技而闻名于海内外.     

Determinants of success of restaurant crowdfunding

This study explores the determinants of restaurant crowdfunding success, inspired by success determinants found in independent restaurant literature. The results indicate that community orientation, images that show elements of the restaurant concept, and frequent communication with funders are key drivers for success. We conclude that restaurant entrepreneurs who show that their project benefits the community where they operate, provide constant updates that maintain project interest, and are responsive to funders’ comments are more likely to succeed in reward-based crowdfunding.     

An Examination of the Impact of Sponsorship on Attendees' Recognition of Sponsors

ABSTRACT

Sponsorship is a critical component of the convention and exhibition industry. There are diverse forms of sponsorships in this industry and many sponsors expect more benefits derived from their contributions than those from typical marketing activities, such as advertising and public relations. However, there have been few attempts to examine the impact of sponsorships in the convention and exhibition area. This study evaluated the impact of sponsorship by assessing attendees' recognition of sponsors in relation to different types of sponsorships and number of days attending a show. Results indicated that attendees' recognition level of the sponsors varied depending on the type of sponsorships and the number of days attending a show. In addition, sponsoring companies achieved a much higher recognition level than non-sponsoring companies. Based on the findings of this study, business and marketing implications are also discussed.     

可持续旅游发展的价值依据比较

本文追溯了可持续旅游发展观在不同学科中的理论渊源,分析了"可持续旅游发展"的不同价值诉求,探讨了基于功利价值、正义价值或良心价值等不同价值基础之上的"可持续旅游发展".环境与发展经济学、旅游社会学、旅游人类学的部分流派的理论范式和研究方法可以为旅游发展提供现实的、可操作的指导,体现了对功利价值的追求.旅游社会学和旅游人类学的主要流派理论密切关注旅游的社会、政治及文化影响,体现了对正义价值的追求.而环境伦理和生态伦理学则更多地考虑了整个生态系统的和谐发展,体现了对良心价值的追求.     

Influence of the measurement of distance on assessment of recreation access

Residents’ recreation behavior is highly influenced by their level of access to recreation opportunities. Distance is an important component of access. The purpose of this study was to measure levels of access to public beaches in the Detroit Metropolitan Area (DMA) using four travel distances (1, 6, 10, and 20 miles) and three access measures (minimum distance, travel cost, and covering), with the intent of demonstrating the sensitivity of findings to both the distance and measure employed. Findings indicate that while public beaches are geographically accessible for a majority of the DMA population within 20 miles according to all access measures, at distances less than 20 miles level of access varies substantially with the access measure used. Future access studies should consider a range of travel distances rather than the single distance typical of most prior analyses and should also be sensitive to the differentials produced by the access measure employed.