大野瞭望     

《南方国土资源》2004,(5):44-46

吴水木获全国“五·一”劳动奖章4月30日,广西区总工会在南宁召开隆重的表彰大会,表彰获得全国“五·一”劳动奖状奖章和广西“五·一”劳动奖状奖章的先进集体和先进个人。桂林水文工程地质勘察院院长吴水木同志获得全国“五·一”劳动奖章。广西二七四地质队铝土矿项目组和该项目组的总工程师农恒杰同志,分别获得广西“五·一”劳动奖状和广西“五·一”劳动奖章。　 　林均匀　蒋伟东广西抽查土地估价机构业绩为进一步规范广西土地估价机构管理,最近广西国土资源厅组织有关专家对全区土地估价机构2003年度第四季度的土地估…  相似文献   

虾—鱼—贝—藻多池循环水生态养殖模式的研究     

申玉春  叶富良  梁国潘  向献芬 《广东海洋大学学报》2004,24(4):10-16

建立了一种虾、鱼、贝、藻多池循环水生态养殖及水质生物调控系统 ,该系统包括对虾养殖、鱼类养殖、贝类养殖、大型海藻栽培等 4个功能不同的养殖区 ,1个水处理区及 1个应急排水渠。通过在封闭循环系统内不同池塘中放养生态位互补的经济动植物 ,对虾池水质环境进行生物调控。结果表明 ,循环系统内虾池水层悬浮物数量、COD值、氨态氮含量比对照组单养对虾池明显降低 (t检验 ,P <0 .0 1)。养殖后排放水不处于富营养化状态 (E <1)。投入每千克对虾饲料生产0 .6 6 7kg对虾 ,同时生产 0 .0 37kg罗非鱼、0 .738kg牡蛎、0 .4 37kg江蓠 ,饲料利用率和经济效益显著增加。该养殖模式还具有防病性、环保性、高效性等优点  相似文献   

GROUNDWATER QUALITY AND CONTAMINATION INDEX MAPPING IN CHANGCHUN CITY, CHINA   总被引：13，自引：0，他引：13  

Hamadoun BOKAR 《中国地理科学(英文版)》2004,14(1):63-70

1INTRODUCTIONGroundwater in Changchun City assures about 45% of total water supply. Drinking water supply of Chang-chun City was mostly served by surface water from Shitoukoumen and Xinlicheng reservoirs located in the east and south of the city (ZHANG, 1993). However, with the development of urban construction the ground-water especially from deep boreholes is also used for drinking purpose in suburban areas. The urbanization process in Changchun City threatens the groundwater quali…  相似文献   

浅谈齐齐哈尔市地下水资源的开发与保护     

闫红宇 《黑龙江国土资源》2009,(3):47-47

齐齐哈尔市地下水资源比较丰富，据计算，地下水可采资源量为68304×104m3／a，目前开采量仅占可开采量的33．1％，开采潜力巨大。50m～70m以下的深层承压水，水质优良的偏硅酸检出含量为20．80mg／L～48．33mg／L，在城区东部，少数井点的检出值近于医疗矿泉水标准（达50mg／L）。可以说，齐齐哈尔市地下水不但资源丰富，而且深层地下水水质尤其优良，对其保护和合理利用具有重要意义。  相似文献   

利用混沌粒子群算法确定河流水质模型参数   总被引：1，自引：0，他引：1  

孟令群  郭建青 《地球科学与环境学报》2009,31(2):169-172

将混沌寻优思想引入到粒子群优化算法中,提出了混沌粒子群算法,这种方法利用混沌运动的随机性、遍历性和规律性等特性对当前粒子群体中的粒子进行混沌寻优.通过这种处理使得粒子群体的进化速度加快,从而改善了粒子群优化算法摆脱局部极值点的能力,提高了算法的收敛速度和精度.并将混沌粒子群算法应用于求解分析瞬时投放示踪剂情况下的一维河流水团示踪试验数据以及确定河流水质参数的函数优化问题,结果表明,混沌粒子群算法的收敛性能明显优于粒子群优化算法.  相似文献   

西津水库网箱养殖区浮游植物特征及水质营养状态   总被引：2，自引：0，他引：2  

吴铁军  王大鹏  何安尤  张益峰  雷建军  陈晓汉 《广东海洋大学学报》2009,29(4):89-94

于2006年10月至2008年7月对西津水库米埠坑网箱养殖区浮游植物进行两个年度共8次调查。第1年发现浮游植物6门53属,冬季出现种属最多,达到43属,春、夏季最少,为35属,浮游植物年平均数量为35.18×104 L-1,平均生物量为1.07 mg·L-1。第2年度采集到浮游植物6门47属,以春季出现种属最多,达到40属,夏季最少,为29属,第2年浮游植物年平均数量低于第1年,为19.77×104 L-1,生物量高于第1年,达到1.22 mg·L-1。综合营养指数评价结果显示,米埠坑网箱养殖区处于中营养水平,有向富营养化过渡的趋势。  相似文献   

Underground water quality model inversion of genetic algorithm     

MA Ruijie  LI Xin 《世界地质(英文版)》2009,12(3):164-167

The underground water qualitymodel with non-linear inversion problem is illposed, and boils down to solving the minimum of nonlinear function. Genetic algorithms are adopted in a number of individuals of groups by iterative search to find the optimal solution of the problem, the encoding strings as its operational objective, and achieving the iterative calculations by the genetic operators. It is an effective method of inverse problems of groundwater, with incomparable advantages and practical significances.  相似文献   

Water, organic matter, nitrogen and phosphorus contents in sediment of a large-scale mariculture area in the Zhelin Bay of eastern Guangdong Province, China     

DONG Qiaoxiang  LIN Jun  SHANG Xu  LI Jin  HUANG Changjiang 《海洋学报(英文版)》2008,27(2):133-148

The Zhelin Bay is one of the most important bays for large-scale mariculture in Guangdong Province, China. Owing to the increasing human population and the expanding mariculture in the last two decades, the ecological environment has greatly changed with frequent harmful algal blooms. A monthly survey of water content, organic matter （TOM）, and various forms of nitrogen and phosphorous in sediment from July 2002 to July 2003 in the bay was conducted. The results showed that the water content was correlated significantly with TOM and various forms of nitrogen and phosphorus and can be used as proxy for quick and rough estimate of these factors in the future surveys. TOM was also correlated significantly with various forms of nitrogen and phosphorus, indicating that it was one of the key factors affecting the concentrations and distributions of nitrogen and phosphorus in the investigated waters. Average total Kjeldhal nitrogen （TkN） content was（ 1 113.1 ± 382.5）μg/g and average total phosphorus （TP） content was（567.2± 223.3）μg/g, and both were much higher than those of similar estuaries in China and elsewhere. Average nitrogen and phosphorus tended to be higher inside than outside the bay, higher at aquaculture than non-aquaculture areas, and higher at fish-cage culture than oyster culture areas, suggesting that large-scale mariculture inside the bay played an important role in the eutrophication of the Zhelin Bay. Various forms of nitrogen and phosphorus concentrations were higher during the warm season （July--September）, which was due to the increased decomposition and concentration of organic matter resulted from the fast growth and high mortality of the cultured species. Compared with July 2002, TkN and TP contents were much higher in July 2003, in consonance with the eutrophication of the Zhelin Bay. Because exchangeable phosphorus （Ex-P）, iron-bounded phos- phorus （Fe-P） and organic phosphorus （OP） combined accounted for 34.3% of the TP and authigenic phosphorus （Au-P  相似文献   

溶菌酶和抗菌肽在对虾养殖中的应用          下载免费PDF全文

张海波  吴嘉敏  谭洪新  王兴强  阎斌伦 《海洋科学》2008,32(6):61-65

近年来，我国对虾养殖业取得了巨大进步。然而，随着养殖环境日趋恶化和人为原因导致的水质污染等问题的出现，使我国的养虾业依旧面临着流行性病原（细菌、病毒和真菌）的考验。为了从源头上防治和根除这些疾病，国内外一些专家、学者对对虾的先天免疫特别是溶菌酶（Lysozyme）和抗菌肽（Anti—microbial Peptides，AMPs）及其基因工程方面做了深入的研究并且有了一定进展。  相似文献   

闽江口入海悬沙输运的数值模拟   总被引：1，自引：0，他引：1  

汤军健  余兴光  陈坚  陈楚汉  李东义 《台湾海峡》2009,28(1):90-95

闽江河口位于福建省东部，本文利用欧拉-拉格朗日差分方法模拟闽江口及附近海域在不同径流下的潮流场，并建立拉格朗日水质点跟踪方法近似模拟了悬沙在海域中的迁移过程．水质点运动轨迹计算结果表明，闽江口悬沙在外海主要向南方或东南方输运，其轨迹呈现螺旋线．在洪峰流量下，悬沙运移距离较远．  相似文献