A Climatic Sequence Stratigraphic Model in the Terrestrial Lacustrine Basin:A Case Study of Green River Formation,Uinta Basin,USA

In recent years, with the development of terrestrial sequence stratigraphy, more attention has been focused on the study of the terrestrial lacustrine sequence stratigraphic model globally. Different viewpoints are preferred by researchers. Under the guidance of the theory of sequence stratigraphy, the findings of this paper indicate that climate is a major factor controlling the formation of the fourth-order sequence, based upon the study of the sequence stratigraphy in the Green River Formation of the Uinta basin in the USA. It also divides the fourth-order sequence in the terrestrial lacustrine basin into two system tracts： the wet （rising） half-cycle and the dry （falling） half- cycle, establishing a new-style fourth-order sequence stratigraphic model for the terrestrial lacustrine basin, that is, the climate-genetic sequence stratigraphic model. As a result, the theory of sequence stratigraphy is greatly enriched.

THE PROTECTION OF THE ECOLOGIC ENVIRONMENT OF THE GREEN CORRIDOR IN THE LOWER REACHES OF THE TARIM RIVER

The Green Corridor in the lower reaches of the Tarim River is not only a unique natural landscape in desert but also an important passageway. Nowadays, the ecologic environment of the corridor is getting worse and worse due to man’s economic activities and the lack of knowledge of the importance of the environment, which is one of is the three environment problems in Xinjiang. The corridor is in great need of planning and managing.

Industrial Green Spatial Pattern Evolution of Yangtze River Economic Belt in China

We use the directional slacks-based measure of efficiency and inverse distance weighting method to analyze the spatial pattern evolution of the industrial green total factor productivity of 108 cities in the Yangtze River Economic Belt in 2003–2013.Results show that both the subprime mortgage crisis and ‘the new normal' had significant negative effects on productivity growth,leading to the different spatial patterns between 2003–2008 and 2009–2013.Before 2008,green poles had gathered around some capital cities and formed a tripartite pattern,which was a typical core-periphery pattern.Due to a combination of the polarization and the diffusion effects,capital cities became the growth poles and ‘core' regions,while surrounding areas became the ‘periphery'.This was mainly caused by the innate advantage of capital cities and ‘the rise of central China' strategy.After 2008,the tripartite pattern changed to a multi-poles pattern where green poles continuously and densely spread in the midstream and downstream areas.This is due to the regional difference in the leading effect of green poles.The leading effect of green poles in midstream and downstream areas has changed from polarization to diffusion,while the polarization effect still leads in the upstream area.

Green GDP Accounting in Yellow River Delta

The economic losses caused by water pollution,air pollution and noise pollution in the Yellow River Delta are estimated,and the green GDP is calculated. The results show that water pollution caused economic losses of about 541. 5814 million yuan in the Yellow River Delta in 2010; particulate matter caused health risk economic losses of 163. 1369 million yuan,and excess mortality economic losses of33. 4742 million yuan; noise pollution caused economic losses of 594. 2768 million yuan. The total losses reach approximately 2705. 198 million yuan,accounting for 0. 97% of the total GDP. After subtracting the total losses from the total regional GDP( 541. 58 billion yuan),the revised green GDP is about 536. 3127 billion yuan. Obviously,environmental pollution has a certain impact on the economic growth.The coordinated development of environment and economy can be achieved by adjusting the industrial structure,developing circular economy and so on.

Project of “Three Networks Greening” based on optimal allocation in the Yellow River Delta,China (Dongying section)

We have used the Yellow River Delta （Dongying section） as our study area to address the project of ＂Three Networks Greening＂ （TNG）. With the use of GIS technology and from an ecological point of view, an optimal allocation scheme of land resources is constructed and applied to guide the adjustment of land resources. Given this scheme, we have calculated that the area of land suitable for forest and shrubs without greening is 2256 km^2. Simultaneously, acting on the layout of the TNG project, afforestation site types are prepared and improved. Soil types, microrelief, salinity and underwater levels are combined as major classification factors and irrigation conditions as a reference to classify sites into eight types. In this way, land suitable for forest and grass is afforested given particular planting patterns. Finally, by overlaying this forestry site type map with the TNG plan map, some suggestions and strategies are proposed and used to direct the TNG project. An ecological oasis of the Yellow River Delta should be the result.

黄河流域绿色高质量发展与绿色技术创新的动态关联分析

以黄河流域各省份2011—2020年的数据为研究样本,构建绿色高质量发展的评价指标体系,运用全局主成分—熵权法对绿色高质量发展综合指标进行测度,并采用聚类分析和面板向量自回归模型(PVAR)系统考察黄河流域绿色技术创新与绿色高质量发展水平的动态关联效应。研究结果表明:(1)2011—2020年,黄河流域各省份的绿色高质量发展水平整体呈上升趋势,不同地区的绿色高质量发展水平差异显著。(2)黄河流域的绿色技术创新与绿色高质量发展之间相互影响,各个省份绿色技术创新和绿色高质量发展水平一一对应。(3)黄河流域的绿色技术创新和绿色高质量发展之间存在明显的双向促进关系,且影响效果显著,即绿色高质量发展有助于绿色技术创新的提升,绿色技术创新能推动绿色高质量发展。

Green development of industries in Yangtze River Economic Belt

Green development is the keynote of Yangtze River Economic Belt. It must insist on ecology preferential and green development which is not only respectation of natural laws but also the economic laws and social laws. The article uses SWOT analytic method to analyze the internal and external surroundings of the green development of Yangtze River Economic Belt on the basis of getting a clear understanding of its present developing status. Based on this the article puts forward the strategy pattern and path selection of green development of Yangtze River Economic Belt.

SWOT Analysis of Urban Greening Maintenance and Management in the Central Pearl River Delta

We take Shunde District,Foshan City in Guangdong Province for example,to carry out SWOT analysis of urban greening maintenance and management.The strengths of greening management and maintenance in Shunde District are as follows:(i)The greening area and quality are continuously improved in the downtown of Shunde District;(ii)The management and maintenance work is carried out well;(iii)The management and maintenance level tends to be increasingly perfected.The weaknesses of greening management and maintenance are as follows:(i)The fees for greening management and maintenance are very low;(ii)There is corner as yet untouched in the junction of some town streets;(iii)The greening management and maintenance technicians are unprofessional;(iv)The greening management is not in place;(v)There is management vacancy phenomenon in the management and maintenance of regional green space;(vi)The design and construction phase is flawed.Finally,based on the analysis of strengths and weaknesses of greening,we put forth the recommendations for the development of management and maintenance in urban green space.

淮河生态经济带绿色城镇化发展现状及对策分析——以淮南市为例

随着我国经济社会的飞速发展,淮河以其固有的地理位置,在全国经济发展中的地位日益突出,特别是淮河生态经济带上升为国家战略以后,区域内人口质量、经济发展、环境保护以及城乡协调等均有所提升,但差距依然十分明显。文章在分析淮河经济带发展现状的基础上,从淮河生态经济带环境保护和生态修复、深化经济体制改革、加强人才发展和促进城乡一体化发展方面提出对策。

数字技术创新与绿色全要素生产率:来自黄河流域的经验证据

文章采用2011—2020年黄河流域地级市面板数据,在克服内生性问题的基础上,运用双向固定效应模型、面板IV估计等经验分析方法实证考察了数字技术创新对黄河流域绿色全要素生产率的影响。研究表明:数字技术创新对黄河流域绿色全要素生产率具有显著的促进作用,该结论在控制了外生政策冲击、剔除部分样本及缩尾处理后依然稳健。异质性分析进一步表明数字技术创新对黄河流域非资源型城市、中心城市以及中下游地区绿色全要素生产率促进作用更为明显。而机制分析发现绿色技术创新、产业结构高级化和产业协同集聚是数字技术影响黄河流域绿色全要素生产率的三个重要路径。因此,需要加大数字技术创新投入,提升城市数字技术吸收转化能力,为充分释放数字技术环境效应创造有利条件。

基于冗余分析的成都市府河缓冲带土地利用对水质的影响

土地利用是影响河流水环境质量的重要因素之一。然而,大型城市河流缓冲区的土地利用类型及组成对河流水质的影响方式仍不清晰。选取成都市中心城区的府河及其支流作为研究对象,设置17个水质监测断面,于2018年1月—2019年12月对COD_(Mn)、NH_(4)^(+)-N和TP 3个水质指标开展连续监测。同时,还获得了相同时段内的降水数据和基于高分卫星(GF-1)影像解译的土地利用数据。在此基础上,利用空间分析以及冗余分析方法,探讨河岸缓冲区内土地利用结构、组成对府河及支流水质的影响。研究结果表明:选取河段从上游到下游的COD_(Mn)、NH_(4)^(+)-N和TP浓度均呈增加趋势,这3类污染物在上游第一个监测断面浓度依次为1.73、0.26、0.06 mg/L,到下游最后一个监测断面浓度为2.59、0.97、0.15 mg/L。相对于干流,府河支流污染物浓度无明显空间分布特征。从时间上看,6—9月水体中各污染物浓度相对较高。基于冗余分析的结果发现,在河段2 000 m缓冲区范围内的土地利用类型对水质的影响最明显,校正后的解释度达57%,表明河段内污染物质主要源于此区域。该范围内,建设用地与其他生产用地可能是COD_(Mn)与NH_(4)^(+)-N的主要源区,农业用地是TP的主要来源,生态用地对于COD_(Mn)与NH_(4)^(+)-N具有一定的吸收分解作用。但是,研究区生态用地以园林绿化用地为主,需要施用磷肥,可能成为水体TP的重要贡献源。因此,合理规划河流2 000 m缓冲范围内的建设用地与生态用地比例,控制园林绿化用地的施肥用量,是保障成都市城市河流水环境安全的重要途径。

长江经济带产业绿色转型升级:进展、挑战与路径

产业绿色转型升级是长江经济带实现高水平保护和高质量发展的重要支撑。近年来,长江经济带坚持共抓大保护、不搞大开发,坚持生态优先、绿色发展,产业结构和工业结构持续优化,绿色产业成为经济增长新引擎;积极推动产业绿色低碳技术改造,绿色制造体系初步建立;稳步推进沿江化工企业“关改搬转”,产业布局与产业结构更加合理。新时代,长江经济带产业绿色转型升级面临着传统行业规模大、企业内生动力不足、长效机制尚未形成、基础能力相对薄弱以及区域产业协同不畅等多方面挑战,下一阶段,长江经济带产业绿色转型升级应着重加强基础性工作,健全发展机制、优化发展环境、增强企业绿色转型升级的内在动力和能力。

农业绿色发展效率及时空格局演变研究——基于黄河流域九省(区)数据

深入研判黄河流域农业绿色发展效率地区差异及演变趋势,对推动黄河流域生态保护和农业高质量发展具有重要意义。基于2011-2022年黄河流域九省(区)数据,采用非期望产出SBM模型、Dagum基尼系数、核密度估计及变异系数分析方法,测算黄河流域九省(区)农业绿色发展效率,分析时空格局演变。结果表明:黄河流域农业绿色发展效率整体上呈波动上升态势,效率值从2011年的0.38上升至2022年的0.92;黄河流域上中下游区域发展存在差异,但发展效率差距整体呈下降趋势,总体基尼系数由2011年的0.29下降到2022年的0.13,其中地区间差异是造成整体差距大的主要原因。由此,提出健全农业绿色发展制度体系、深化黄河流域省际农业合作、强化农业绿色发展技术支撑等对策建议。

长江流域农业绿色发展水平评价与时空差异分析

对长江流域农业绿色发展水平进行评价与影响因素分析,能促进长江流域农业绿色高质量发展。基于2006—2020年长江流域19个省份的面板数据,从绿色生产、绿色生态、经济效益、生活水平四个维度构建了农业绿色发展水平评价指标体系;并通过熵权法对各省份农业绿色发展水平进行测度;最后应用区域差异分析法、空间自相关性分析对区域内与区域间的时空发展差异、关联度进行探讨。结果表明:(1)长江流域农业绿色发展水平整体呈现出稳步上升趋势,干流发展趋势优于支流。(2)长江流域农业绿色发展水平区域差异呈现出波动扩大的变化趋势。(3)长江流域各省份农业绿色发展水平显示出空间聚集效应,其中上海、江苏、浙江是高—高聚集模式,重庆、贵州、广西是低—低聚集模式。因此,要提高长江流域农业绿色发展水平,各省份应制定个性化政策、重视并补齐发展短板、加强区域间辐射效应。

长三角一体化发展战略下蚌埠市绿色农产品基地建设路径分析

发展绿色农业产业基地是农业高质量发展的有效途径之一。本文分析了蚌埠市绿色农产品基地建设成效,针对目前建设中待提升的环节,围绕绿色农业产业链,探讨了绿色农产品基地建设路径,包括推进三产融合与绿色农产品基地建立,优化长三角区域绿色农产品供给,培育长三角绿色农产品市场平台,促进以绿色农产品深加工为重点的全产业链发展,提升绿色农产品质量与品牌效应,以及加大农业转型升级要素保障等,为探索长三角绿色农产品基地建设路径提供参考。

物流业与绿色经济耦合协调发展的时空演化与影响因素分析——以黄河流域为例

为了探究物流业与绿色经济之间的协调发展问题,以黄河流域为研究对象,运用熵权TOPSIS法确定二者协调发展的指标权重,构建了黄河流域物流业与绿色经济协调发展评价指标体系,采用耦合协调度模型分析其耦合协调性并对其时空演化特征进行讨论,运用MGWR模型探究黄河流域各省物流业与绿色经济发展耦合协调度的影响因素。结果表明:黄河流域物流业与绿色经济的耦合协调度呈现出上升态势,但处于勉强协调;下游地区的耦合协调度比较高,但是对于周围地区的辐射带动作用没有发挥出来,导致空间差异比较大;五个方面的影响因素都呈现正相关。基于研究结果,提出了黄河流域物流业与绿色经济协调发展的对策。

新能源汽车产业集聚对区域绿色经济效率的影响——基于长江经济带的实证研究

将产业集聚、绿色技术创新和绿色经济效率纳入同一研究框架,聚焦长江经济带,研究新能源汽车产业集聚对绿色经济效率的影响,为我国在“双碳”背景下推进实现制造强国的战略目标及长江经济带新能源汽车发展提供参考。论文基于2012—2020年长江经济带沿线11个省市面板数据,综合利用超效率SBM和区位熵法,构建计量模型,实证研究新能源汽车产业集聚对绿色经济效率的影响,探讨绿色技术创新的中介效应,并进一步分析新能源汽车产业集聚对绿色经济效率的空间溢出效应和区域异质性。研究结果表明:1)长江经济带整个区域已形成“带状”新能源汽车产业集聚区,集聚平均水平随年份波动上升,上中下游产业集聚水平呈递增格局,水平差异较大且有逐渐增加趋势;2)新能源汽车产业集聚通过整合内部网络资源和提升外部整体能力,对长江经济带绿色经济效率具有正向促进作用;3)产业集聚的发展通过竞争效应和合作效应促进绿色技术创新,而绿色技术创新的发展可以提升经济动力和效率,因而绿色技术创新在产业集聚与绿色经济效率之间具有中介作用;4)新能源汽车产业集聚对绿色经济效率具有空间溢出效应,上中下游新能源汽车产业集聚对绿色经济效率的影响存在差异。据此,从加强产业集群建设,发挥新能源汽车产业发展的长效机制、强化发展绿色技术创新体系和推动新能源汽车区域异质性发展三个方面提出对策建议。

长江中下游城市内涝与雨季污染协同治理对策

针对长江中下游城市内涝与雨季污染协同治理的突出问题,对城市水安全、雨季水体返黑返臭风险和河湖水生态退化三方面存在的问题进行了论述。发现长江中下游城市河网密度高、降水量大、暴雨多发,同时人口密集、经济发展水平高,内涝、污染、生态退化等水问题突出;城市内涝频发,雨季污染造成某些城市水体局部返黑返臭,严重影响城市水环境品质,成为制约长江中下游城市绿色发展的重要瓶颈问题。提出了建立三级内涝协同防治体系、构建城市“绿-灰-蓝”设施耦合工程体系、协同推进水体品质提升与生态修复等建议。