营造滨湖概念 构建生态合肥

由于城市防洪能力的提高,规模不断扩大,使合肥城市东南侧留作风道的建设控制区以其靠近市中心的区位优势和滨临巢湖的优势,正在吸引大量的投资,城市空间形态表现出对合肥历史上已经形成的非常具有特点的风扇状城市形态的重构趋势。这一地区如何发展,将对合肥未来的发展定位和城市特色起决定性作用。该文从行政区划的调整,城市发展的趋势分析,明确了这一地区的功能定位和下一步的开发建设目标。

已建生态湖底部重新铺设污水管的处理技术研究

市政道路更新替换,管线改造面临工期紧、造价低、污水管堵死,急需保通、无地勘资料的情况,能够快速保质保量完成项目是一个亟需解决的技术难题。以成都市梓州大道重新铺设污水管原位改造工程为研究背景,介绍了已建生态湖底部新改造污水管的施工技术,对处理技术进行研究。

依江带湖 加快洪湖经济发展

从九十年代到下个世纪,长江流域将是中国经济发展的重点和热点地区,长江经济带将会成为继沿海经济带之后我国经济第二条热线。位于长江之滨的洪湖市,如何借长江经济带大发展的东风,抓住机遇,把洪湖建设成为长江流域一个中等明星城市,是85万洪湖儿女的心愿。

畅游承德(散文)

我对承德向往已久。去年金秋时节,这种向往成为现实——我来到了这个地方。 承德的山水奇秀,市区北部的避暑山庄当是这座名城的明珠。避暑山庄的建筑虽不及北京故宫那样雄伟壮丽、金碧辉煌,但是,山庄的建筑布局却很有特点。它有“五步一楼,十步一阁,廊腰缦回,檐牙高啄,各抱地势,钩心斗角”的宫殿区,还有“因山置景,临湖建阁,依松为斋,山环水绕,洲岛错落,千态万状”的苑景区。

Lower Kungurian shallow-water lagoon biota of Middle Cis-Urals,Russia:towards paleoecological reconstruction

The paper deals with the Lower Kungurian （Philippovian Horizon; Lower Permian） biota of the Mid-dle Cis-Urals, Russia. The biota is characterized on the basis of four representative localities （ Philippovskoe Bus-stop, Philippovskian Quarry, Kamai and Kiselevo-Suksun Highway） , which are situated in the stratotype area of the Kungurian stage. All the localities can be regarded as Lagerstatten, but of authentically low biodi-versity ,since they represent oligotrophic lagoons of abnormal fluctuating salinity. General reconstruction of the Philippovian near-shore shallow-water ecosystem is given. Two new species of algae Algites philippoviensis sp. nov., A. shurtanensis sp. nov., and a new species of the limulids Paleolimulus kunguricus sp. nov. are de-scribed for the first time.

Summary on the Harmonious Relationship between Urban Lake Landscapes and Lakeshore Architectural Image

A variety of high-rise building landscapes are trying to invade urban lakes resulting in the shrinkage, fragmentation, pollution of lakes and cut-down of vegetation along lakes. With the development of real estate along lakes, the local marginal lines and natural landscapes nearby are disappearing. How to plan urban landscapes＇？ How to achieve the harmonious relationship between lakeshore landscapes and lakeshore architectural image？ How to render lake sights an organic and sustainable whole？ How to balance the interest between economy and value for each interest group？ How to form urban lake sights and architectural images？ How to utilize and arrange the space？ How to form a harmonious relationship between the lake scenes and buildings in the city？ Through on-the-spot investigation and profound analysis of several lakes in Wuhan, applying enumeration, induction and analysis, the dissertation reveals that people need to share natural resources and get the support from laws and policies with the aim of building a beautiful home. In tmaa, people＇s anticipation is needed to achieve a harmonious relationship between landscapes and architectures.

Research on the Tourism talents training mechanism of Poyang Lake Ecological Economic Zone

In order to promote the tourism development of Poyang Lake Ecological Economic Zone, to attract more customers, to build an effective personnel training mechanism, training professionals is very necessary. The advantages of Poyang Lake Ecological Economic Zone tourism development are introduced in this paper, and pointed out that the tourism talent training needs analysis of talent training status and improvement measures are proposed, including the integration of the region education resources, pay attention to the skilled personnel training, improve the teaching curriculum setting, improve the quality of Teachers, strengthen the construction of training base.

A 12-kyr record of microbial branched and isoprenoid tetraether index in Lake Qinghai,northeastern Qinghai-Tibet Plateau:Implications for paleoclimate reconstruction

Branched and Isoprenoid Tetraether(BIT) index was considered as a proxy for terrestrial organic matter input in lake sediments, based on the assumption that branched glycerol dialkyl glycerol tetraethers(b GDGTs) are mainly derived from terrestrial soils. However, mounting evidences have showed that the in situ production of b GDGTs is widespread in lakes, challenging BIT as a reliable terrestrial input proxy. Recently, BIT has been proven to be a reliable proxy for paleohydrology in a small crater lake(Lake Challa) in accordance with a different mechanism. However, the response of BIT to paleohydrology variation may differ for different lakes. In this study, we investigate the variations in the BIT index and the concentrations of its related GDGTs in a 12-ka sediment core from Lake Qinghai, in combination with our previous results for surface sediments. We find that variations in BIT strongly depend on the concentration of crenarchaeol in both surface and ancient sediments of this lake, whereas b GDGT concentration varies much less remarkably. Considering that crenarchaeol production is positively correlated with water depth in Lake Qinghai, water depth may exert negative control on the BIT index in this lake. This case is inconsistent with the positive relationship between BIT and lake levels or rainfall intensity reported for Lake Challa, suggesting that the response of BIT to local paleohydrology is site specific in lacustrine systems. Hence, the application of sedimentary BIT as a paleohydrological proxy in a specific lake requires caution before confirming the environmental controls on BIT in that lake.

Farmer-based Rice Cropping Systems in the Poyang Lake Region, China: Analysis of Characteristics and Policy Implications

This paper examines the spatial characteristics of farmer/household behaviors in regional rice cropping systems(RCS), and the results provide necessary information for developing strategies that will maintain regional food security. Through field study and statistical analysis based on 402 households questionnaires finished in 2014-2015 in the Poyang Lake Region(PLR) of China, we arrived at two main conclusions. First, single-and double cropping rice were found across the study area, but showed a general distribution trend, with double cropping rice in the southeast part(especially in Jinxian county) and single cropping rice in the northwest(particularly in De’an county). Second, the household decisions concerning RCS varied in different parts of the PLR, but double cropping was the dominant type, with about 63.57% of the respondent households in the PLR cultivating double cropping rice. However, the multiple-cropping index of paddy rice was only 1.55. About 3% of interviewed households had altered their RCS during this period. Based on these findings, the local governments should guide farmers’ paddy field cultivation behaviors by increasing the comparative efficiency of rice production, promoting appropriate scale operations and land conversion, as well as optimizing rice growing conditions to improve the multiple cropping index and enhance food provision. Finally, land-use efficiency and more sustainable use of land resources should be improved.

Distribution of GDGTs in lake surface sediments on the Tibetan Plateau and its influencing factors

Quantitative paleotemperature records are vital not only for verifying and improving the accuracy of climate model simulations, but also for estimating the amplitude of temperature variability under global warming scenarios. The Tibetan Plateau(TP) affects atmospheric circulation patterns due to its unique geographical location and high elevation, and studies of the mechanisms of climate change on the TP are potentially extremely valuable for understanding the relationship of the region with the global climate system. With the development of biomarker-based proxies, it is possible to use lake sediments to quantitatively reconstruct past temperature variability. The source of Glycerol Dialkyl Glycerol Tetraethers(GDGTs) in lake sediments is complex, and their distribution is controlled by both climatic and environmental factors. In this work, we sampled the surface sediments of 27 lakes on the TP and in addition obtained surface soil samples from six of the lake catchments. We analyzed the factors that influence GDGT distribution in the lake sediments, and established quantitative relationship between GDGTs and Mean Annual Air Temperature(MAAT). Our principal findings are as follows: the majority of GDGTs in the lake sediments are b GDGTs, followed by crenarchaeol and GDGT-0. In most of the lakes there were no significant differences between the GDGT distribution within the lake sediments and the soils in the same catchment, which indicates that the contribution of terrestrial material is important. i GDGTs in lake sediments are mainly influenced by water chemistry parameters(p H and salinity), and that in small lakes on the TP, TEX_(86) may act as a potential proxy for lake p H; however, in contrast b GDGTs in the lake sediments are mainly controlled by climatic factors. Based on the GDGT distribution in the lake sediments, we used proxies(MBT, CBT) and the fractional abundance of b GDGTs(f_(abun)) to establish calibrations between GDGTs and MAAT, respectively, which potentially provide the basis for paleoclimatic reconstruction on the TP.