基于模糊综合评价法的海岛深层地下淡水开发潜力评价

研究并选取了与海岛深层地下淡水开发利用相关的自然、社会和施工3个方面12个影响因素,并采用模糊综合评价法构建了海岛深层地下淡水开发潜力评价模型。利用该模型对嵊泗泗礁山岛深层地下淡水开发利用潜力进行的评估,得出开发潜力巨大的结论。这一评价结果与其他学者研究结果一致,说明所建立的模型评估结果较为准确,可为海岛深层地下淡水开发潜力的评估提供一条较为客观、准确的途径。     

Variation of freshwater components in the Canada Basin during 1967–2010

As a conservative tracer, oxygen isotopes in seawater are widely used for water mass analysis, along with temperature and salinity. In this study, seawater oxygen-18 datasets in the Canada Basin during 1967–2010 were obtained from the four cruises of the Chinese National Arctic Research Expedition(1999, 2003, 2008, and 2010) and the NASA database. Fractions of sea ice meltwater and river runoff were determined from the salinity-18O system. Our results showed that the river runoff decreased from the south to the north in the Canada Basin. The enhanced amount of river runoff observed in the southern Canada Basin may originate from the Mackenzie River, transported by the Beaufort Gyre. The river runoff component showed maximum fractions during 1967–1969, 1978–1979, 1984–1985, 1993–1994, and 2008–2010, indicating the refresh time of the river runoff was 5.0–16.0 a in the Canada Basin. The temporal variation of the river runoff was related to the change of the Arctic Oscillation(AO) index, suggesting the freshwater stored in the Canada Basin was affected by surface sea ice drift and water mass movement driven by atmospheric circulation.     

卡罗藻毒素研究进展

<正>剧毒卡罗藻Karlodinum veneficum(又称Karlodinium micrum)作为一种典型的赤潮种,是海水养殖水域和自然水体中一种常见的裸甲藻种类,为混合营养型生物。该藻自20世纪50年代被发现以来,在过去的60年中其命名曾发生过多次变更,直到最近将其归入裸甲藻种类,被译为剧毒卡罗藻[1](也有学者命名为剧毒卡尔藻[2])。该藻自首次在南非被发现     

A Comparative study on the nonspecific immunity of juvenile Litopenaeus vannamei ever inhabiting freshwater and seawater

A study on the nonspecific immunity of Litopenaeus vannamei ever inhabiting freshwater and seawater was carried out at different molt stages by comparing their total hemocyte count(THC) and respiratory burst(RB) and activity of phenol oxidase(PO), nitric oxide synthase(NOS) and lysozyme(LY). Two-way ANOVA showed that salinity and molt stage independently affected THC and RB and the activity of PO, NOS and LY of juvenile L. vannamei significantly(P 0.05). The THC and RB and the activity of NOS gradually increased from the post-molt stages(A and B) to the pre-molt stages(D0–D3), which were common in shrimps inhabiting freshwater and seawater. The activity of PO peaked at the inter-molt stage(C), and touched the lowest at the post-molt stage in freshwater and pre-molt stage in seawater. The activity of LY was stable over the molt cycle. The RB and the activity of PO, NOS and LY of juvenile L. vannamei were significantly lower in freshwater than in seawater; whereas THC was significantly higher in freshwater than in seawater(P 0.05). It was concluded that the post-molt stage(especially stage A) was critical to shrimp culture, which should be intensively attended when L. vannamei was cultured in freshwater.     

浅谈湖北省第一次全国地理国情普查水域采集

介绍了地理国情普查的内容和水域采集要求,从选取指标、综合指标及范围定位标准等方面对地理国情普查水域采集与1∶10 000地形图水系要素的采集进行了比较。     

探地雷达在淡水区浅水域的探测试验

通过堤防护岸水域抛石探测、水下砼格及碎石层探测、江边堆场滑坡水域探测三个案例,说明探地雷达在淡水区浅水域探测效果。重点分析了探测对象所处环境的电导率、介电常数和探测所采用天线频率对探测效果的影响。探地雷达填补了浅水域工程勘察空白,研究成果对非水域探地雷达探测与检测具有借鉴意义。     

河北省唐海县地下淡水资源均衡分析

随着唐海县的工业和人口发展迅速,地下水处于超采状态。本文采用水均衡法,分析了唐海县地下淡水的补给与排泄量,区内年平均总负均衡为979.76×10~4m~3/a。为唐海县水资源的可持续利用提供了依据。     

服务沿海开发推进海洋强省建设

江苏是海洋与渔业大省,海岸线长954千米,海域面积3．75万平方千米．内陆水域面积1．73万平方千米。发展海洋经济、建设现代渔业,对于江苏经济社会发展具有重要作用。     

21世纪能源可持续发展的实践交流

关于水资源。河流干枯、地下水位下降,被视为水资源紧缺的证据,据预测到2050年有些国家共约10亿人口生活将面临绝对缺水状况。水覆盖地球表面70％,但是只有25％的淡水,实际上可供利用淡水仅占世界淡水总量的0．3％,水资源是重要的战略资源。     

聚焦讷河

北枕兴安龙脉,南接万顷平畴;西望泱泱嫩水,东邻五大连池。——隶属于齐齐哈尔的讷河市,土地肥沃,水域辽阔,素有“黑土明珠”、“北国粮仓”之美誉。做为“中国马铃薯之乡”、“中国甜菜之乡”,这里虽然地处偏远,但境内阡陌流金、黑土丰饶。近年来经济社会迅猛发展,社会各项事业蒸蒸日上,