搜索结果: 31-45 共查到“知识库 水文化学”相关记录260条 . 查询时间(1.328 秒)
SPATIAL EVALUATION OF FEEDLOT RUNOFF AND FeHyd COMPUTER PROGRAM
Feedlot Runoff Pollution GIS
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2014/11/12
In this study 6 feedlots that are located on a watershed in North Dakota are evaluated
considering the State Laws and literature with respect to their potential to cause water pollution.
In the eval...
GENERALIZED PHYSICAL APPROACH OF ESTIMATING AREAL PROBABL MAXIMUM PRECIPITATION (PMP) FOR PLAIN REGION OF THE GODAVARI RIVER BASIN (INDIA)
Probable Maximum Precipitation (PMP) Depth-Area-Duration (DAD) analysis
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2014/11/12
In this paper a generalized physical approach of estimating areal probable maximum
precipitation (PMP) for the non-orographic region of the Godavari river basin has been developed.
In this method,...
AMT法勘查额济纳盆地与巴丹吉林沙漠接触关系
巴丹吉林沙漠 接触关系 AMT勘查
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2014/8/8
查明额济纳盆地东部与巴丹吉林沙漠之间的接触关系，有助于分析额济纳盆地地下水水位下降、生态环境恶化的原因。通过当地地质资料和物探方法的对比分析，选择合理有效的音频大地电磁法（AMT）物探手段，在该区域进行了原始创新性的勘查工作。勘查结果认为额济纳盆地上升、巴丹吉林沙漠下降，两侧地层岩性厚度变化较大，推断额济纳盆地与巴丹吉林沙漠为张性断层接触。研究可为分析两者之间地下水转化关系和额济纳盆地地下水水位下...
滹沱河大型入渗试验地下水补给量计算
滹沱河 大型入渗试验 水均衡法
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2015/9/9
通过采用水均衡法计算了滹沱河入渗试验期间的河道入渗补给量,并求取了滹沱河水源地一带获得的河道入
渗补给量。研究表明:试验期间河道入渗水量为1482.75万m3
,河道入渗补给地下水量为1382.89万m3
,河道渗
漏补给系数为93%;滹沱河水源地接受的补给量为742.53万m
3
,水源地范围内的观测井最大水位上升幅度6.823
m,地下水补给效果明显。
以淡水单孔蚓（Monopylephorous limosus）、伸展摇蚊（Chironomus tentans）为受试生物，以生长抑制率、死亡率、自断率为测试终点，研究了沉积物中5种重金属（Cu、Cd、Ni、Pb、Zn）对底栖生物的毒性效应，探讨了沉积物中酸挥发性硫化物（Acid Volatile Sulfide，AVS）和同时提取金属（Simultaneously Extracted Metal...
欧洲古代文明是在大海中孕育出来的。在过去的500多年中，一个又一个欧洲强国先后登上了世界历史舞台，成为叱咤风云的主角：16世纪有葡萄牙和西班牙，17世纪有“海上马车夫”荷兰，19世纪有“日不落帝国”英国。纵观历史，可以发现，这些国家既是世界大国，更是海洋强国；一旦丧失了在海洋上的主导权，其大国地位也就衰落了。21世纪是海洋的世纪，也是中国人实现海洋梦想的世纪。当我们为建设海洋强国而奋斗的时候，应当...
Physical and chemical consequences of artificially deepened thermocline in a small humic lake – a paired whole-lake climate change experiment
Physical chemical consequences artificially deepened thermocline
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2010/12/22
Climate change with higher air temperatures and changes in cloud cover, radiation and wind speed alters the heat balance and stratification patterns of lakes. A paired whole-lake thermocline manipulat...
Confirmation of ACRU model results for applications in land use and climate change studies
ACRU model results applications climate change studies
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2010/12/22
The hydrological responses of a catchment are sensitive to, and strongly coupled to, land use and climate, and changes thereof. The hydrological responses to the impacts of changing land use and clima...
Parameterization of a coupled CO2 and H2O gas exchange model at the leaf scale of Populus euphratica
Parameterization coupled CO2 and H2O gas exchange model leaf scale Populus euphratica
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2010/4/7
The following two models were combined to simultaneously predict CO2 and H2O gas exchange at the leaf scale of Populus euphratica: a Farquhar et al. type biochemical sub-model of photosynthesis (Farqu...
The contribution of groundwater discharge to the overall water budget of two typical Boreal lakes in Alberta/Canada estimated from a radon mass balance
groundwater discharge overall water budget typical Boreal lakes radon mass balance
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2010/2/1
Radon-222, a naturally-occurring radioisotope with a half-life of 3.8 days, was used to estimate groundwater discharge to small lakes in wetland-dominated basins in the vicinity of Fort McMurray, Cana...
利用卫星观测海面信息反演三维温度场
卫星遥感海面温度 海面高度 温度剖面重构
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2012/3/9
基于历史观测的温盐剖面资料, 采用回归分析方法统计出海面温度异常、海面动力高度异常与温度剖面异常之间的相关关系; 然后利用高分辨率的卫星遥感海表面温度(SST)和卫星观测海面高度(SSH)信息重构了三维海洋温度场。在台湾岛周边海域建立了时间分辨率为天、空间分辨率为0. 25°×0. 25°的三维温度分析场。通过与实测资料的比较分析, 文章所构建的分析场能够较好地描述海洋三维温度场的结构特征, 能够...
多环芳烃类标准物质使用时效性评价
标准物质 多环芳烃 时效性
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2014/6/13
为对半挥发性有机化合物标准物质的正确使用提供指导，选用美国ChemSevice公司生产的PPH-10RPM“甲醇中16种多环芳烃混合标准物质”，将其分装于2 mL聚四氟乙烯衬盖棕色螺口样品瓶中于-18℃避光贮存，采用气相色谱-火焰离子化检测器方法测试各个特性量值随贮存时间的变化。结果表明，标准物质各个特性量测量的标准偏差在0.3～4.0 μg/mL，最大相对标准偏差为3.92%。在置信度为95%时...
Development of a model for the characterization of fluid dispersion in electrochemical reactors
model for the characterization fluid dispersion electrochemical reactors
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2009/12/4
This paper analyses the hydrodynamic behaviour of electrochemical reactors by simulating stimulus–response experiments. The experiments were performed with a simple experimental arrangement to generat...
IRON METABOLISM IN TWO BASINS OF A LAKE NEAR OSLO,NORWAY
IRON METABOLISM TWO BASINS A LAKE NEAR OSLO
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2009/10/30
Langlivann and Himtjern are two basins in a lake situated on rocks poor
in lime and with coniferous forest and bogs in the surroundings. The lake
is fundamentally oligotrophic. The influence of allo...
ON THE BALANCES OF 90Sr AND 137Cs IN THE BALTIC SEA
BALANCES 90Sr 137Cs BALTIC SEA
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2009/10/29
The total amounts of Sr and 137 CS that accumulated in the water of the
Baltic Sea in the years 1960-67 are estimated on the basis of 10-15 samples
collected annually in different parts of the Balti...