共查询到20条相似文献，搜索用时 62 毫秒
1.
2.
《国际沙棘研究与开发》2017,(3)
景区位于湖南省长沙市望城区,依托城市防洪工程及斑马湖湿地公园而建,景区规划面积9.91 km2,其中水域面积3.64km2,属于城市河湖型水利风景区.
近年来,经过精心打造,建成灌溉、防洪、交通、景观等功能于一体的堤岸工程和沩水水闸工程.景区包括斑马湖生态公园、东湖、张家湖和马桥河湿地公园. 相似文献
3.
随着环境污染问题越来越突出,城市湿地公园已占据人们日常生活不可或缺的地位。植物在湿地公园的应用受到人们的重视,经过对锦绣湖城市湿地公园的调研发现植物布局分区不明确,植物种类和色彩配置单一,不能满足当地人对季节性植物景观的需求。基于对植物的调查研究后,设计师结合当地的实际情况,对锦绣湖湿地公园的植物运用提出问题并进行合理设计,力求选择因地制宜的植物进行植物造景配置,充分发挥植物在湿地公园的作用,满足人民群众实用与美结合的要求,营造人与自然和谐相处的生态景象。 相似文献
4.
5.
正早就听说了衡水湖的盛名,"燕赵最美的湿地"、国家AAAA级旅游景区、"京西第一湖"、东亚"蓝宝石"等多种盛誉,使我心中对衡水湖有了一种神奇的向往。正是带着这种憧憬,庆幸的是去年冬季到衡水湖,尽情地"看了一回鸟"。衡水湖国家级自然保护区坐落在河北省衡水市桃城区、冀州两县区境内,是华北平原唯一保持沼泽、水域、滩涂、草甸和森林等完整湿地生态系统的自然保护区,占地面积283 km2。水域面积75 km2,是华北平 相似文献
6.
出北京向南200余公里,有一颗镶嵌在华北平原上的璀璨明珠——衡水湖。她因一望无际的芦苇而靓丽丰满,也因空灵婉转的鸟鸣而生机勃勃。这里是天鹅的驿站,也是荷花的圣坛。当我与初春的衡水湖第一次亲密接触时,天气料峭依然,一个人徜徉在冰封的芦苇丛中,慢慢品味着“孤舟蓑笠翁,独钓寒江雪”的意境;看着昨日的芦花,听着远去的鸟鸣,眼前的衡水湖仿佛在微风中翩翩起舞…… 这就是河北省衡水湖湿地和鸟类 相似文献
7.
朝阳地区湿地资源极为宝贵,开展湿地资源及湿地生态物种保护尤为重要。建立柳城湿地公园动植物资源监测系统,确定湿地资源和动植物资源生态保护原则,明确具体的保护对象,提出保护策略和建议,以期为湿地公园管理提供借鉴。 相似文献
8.
《节水灌溉》2014,(8)
湿地生态系统脆弱性是学界研究的热点,在参考前人研究成果的基础上,以生态特征、整体功能和社会环境3个要素建立湿地生态系统脆弱性评价指标体系,采用均方差法计算各评价指标的权重值,运用灰色关联理论构建评价模型,对六盘水市明湖国家湿地公园的生态系统脆弱性进行了研究。研究结果表明,六盘水明湖国家湿地公园生态系统脆弱性属于微脆弱、轻度脆弱、中度脆弱、强脆弱和极脆弱的综合关联度值分别为0.575 0、0.749 9、0.789 0、0.634 6和0.515 2,说明六盘水明湖国家湿地公园生态系统脆弱性属于中度脆弱等级。通过评价,了解了明湖国家湿地公园生态系统脆弱性,为明湖湿地公园的进一步规划和管理提供了参考依据。 相似文献
9.
本溪市望溪公园的改造,其规划构思集中体现了休闲、游乐、生态、文化等综合性功能,以及以人为本的设计理念,强调尊重历史,尊重文化,遵从自然,建造现代生态式城市公园。 相似文献
10.
本溪市望溪公园的改造,其规划构思集中体现了休闲、游乐、生态、文化等综合性功能,以及以人为本的设计理念,强调尊重历史,尊重文化,遵从自然,建造现代生态式城市公园. 相似文献
11.
Overland water and salt flows in a set of rice paddies 总被引：1，自引：0，他引：1
E. Playn O. Prez-Coveta A. Martínez-Cob J. Herrero P. García-Navarro B. Latorre P. Brufau J. Garcs 《Agricultural Water Management》2008,95(6):645-658
Cultivation of paddy rice in semiarid areas of the world faces problems related to water scarcity. This paper aims at characterizing water use in a set of paddies located in the central Ebro basin of Spain using experimentation and computer simulation. A commercial field with six interconnected paddies, with a total area of 5.31 ha, was instrumented to measure discharge and water quality at the inflow and at the runoff outlet. The soil was classified as a Typic Calcixerept, and was characterized by a mild salinity (2.5 dS m−1) and an infiltration rate of 5.8 mm day−1. The evolution of flow depth at all paddies was recorded. Data from the 2002 rice-growing season was elaborated using a mass balance approach to estimate the infiltration rate and the evolution of discharge between paddies. Seasonal crop evapotranspiration, estimated with the surface renewal method, was 731 mm (5.1 mm day−1), very similar to that of other summer cereals grown in the area, like corn. The irrigation input was 1874 mm, deep percolation was 830 mm and surface runoff was 372 mm. Irrigation efficiency was estimated as 41%. The quality of surface runoff water was slightly degraded due to evapoconcentration and to the contact with the soil. During the period 2001–2003, the electrical conductivity of surface runoff water was 54% higher than that of irrigation water. However, the runoff water was suitable for irrigation. A mechanistic mass balance model of inter-paddy water flow permitted to conclude that improvements in irrigation efficiency cannot be easily obtained in the experimental conditions. Since deep percolation losses more than double surface runoff losses, a reduction in irrigation discharge would not have much room for efficiency improvement. Simulations also showed that rice irrigation performance was not negatively affected by the fluctuating inflow hydrograph. These hydrographs are typical of turnouts located at the tail end of tertiary irrigation ditches. In fact, these are the sites where rice has been historically cultivated in the study area, since local soils are often saline-sodic and can only grow paddy rice taking advantage of the low salinity of the irrigation water. The low infiltration rate characteristic of these saline-sodic soils (an experimental value of 3.2 mm day−1 was obtained) combined with a reduced irrigation discharge resulted in a simulated irrigation efficiency of 60%. Paddy rice irrigation efficiency can attain reasonable values in the local saline-sodic soils, where the infiltration rate is clearly smaller than the average daily rice evapotranspiration. 相似文献
12.
车用发动机润滑油失效规律与更换周期研究 总被引：7，自引：0，他引：7
研究在正常使用条件下１０Ｗ／３０－ＱＣ级润滑油用于某型车用发动机时所表现的失效规律,确认期服从两参数Ｗｅｉｂｕｌｌ分布,并给出分布的尺度参数η和形状参数ｍ之最佳线性无偏估计（ＢＬＵＥ）同时,还为定量分析,计算车用发动机润滑油的使用可靠性和合理确定其更换周期提供了一套可供借鉴的方法,并给出了具体的计算实例。 相似文献
13.
14.
赵国杰 《农业机械化与电气化》2011,(4):106-107
乡（镇）农技推广体系是农业发展的关键。介绍朝阳市农业技术推广体系的现状,针对目前体制及运行机制、服务手段等方面存在的问题,提出适合朝阳市乡（镇）农技推广体系改革与发展的对策,以期对全省农技推广体系改革和发展起到一些借鉴作用。 相似文献
15.
苑庆刚 《农业机械化与电气化》2010,(3):52-54
草莓果味酸甜爽口,营养价值高,为人们所喜爱的应市鲜果之一。由于草莓易受损伤和微生物侵染,因此其采收、贮藏过程极为重要。介绍草莓采收过程中的注意事项以及11种贮藏保鲜技术的实施步骤和操作方法,推介9种加工方式,为草莓产业化提供技术支持。 相似文献
16.
瓦房店市是我国重要的水果生产基地,在国内水果生产领域占有重要地位。随着水果市场化的不断深入,如何满足和适应国内外市场需求成为瓦房店市水果生产的关键问题。从瓦房店市水果生产实际出发,阐述了实施水果生产标准化的必要性,提出了发展水果生产标准化的具体措施。 相似文献
17.
对引进的谷子新品种金谷子耐旱TG118进行品种比较试验和多点试种。结果表明：该品种抗旱、耐瘠、适应性强,稳产、高产、抗病抗风抗倒伏强,品质优良,粮草兼用,种植简单,省工易管;一般产量在6000kg/hm2以上,比当地主栽品种增产20%以上。最高产量达9450kg/hm2,适于在辽西北地区推广应用。 相似文献
18.
对《种子法》存在问题的探讨 总被引：1，自引：0，他引：1
李鹏 《农业机械化与电气化》2011,(6):129-130
《种子法》是我国种植业第一部法律。自实施以来,为依法加强种子管理提供了有力的法律支撑,促进我国种子产业发生翻天覆地的变化。但随着依法管理工作的深入和种子产业的快速发展,《种子法》及配套规章的一些问题逐步显现出来。对《种子法》及配套规章存在的问题进行深入分析,对需要进一步补充的章节以及需要调整的内容进行深入探讨,以求更加完善和明确。 相似文献
19.
在新世纪,面对机遇和挑战,党的十六大把“社会更加和谐”作为全面建设更高水平的小康社会的一个重要目标。中国人素有社会和谐的理想;西方人自古也向往社会和谐;借鉴东西方两种和谐社会思想的经验、教训,构建社会主义和谐社会理论。 相似文献
20.
About 30 years have passed since the Government of Egypt embarked on implementing a series of large scale drainage projects. At present, about 3.8 million acres have been provided with drainage systems on the basis of systematic pre-drainage investigations and designs. The target is to provide drains in approximately 6.4 million acres in the Nile Valley and Delta.The implementation of the subsurface drainage system is carried out by the public sector and private contractors under direct supervision of governmental regional departments. The implementation process depends on many factors related to the drainage material, machinery, manpower, site requirements, farmers and organizations involved. Problems and constraints are sometimes challenging, however, the annual rate of implementation has gradually increased to 170,000 acre/year.This paper discusses the different aspects involved in the implementation process of drainage systems. The development in materials, machinery and construction technologies will be reviewed. Institutional and management factors are going to be also considered. 相似文献