登录

双语推荐：海河流域

进入期刊文章
基于海河流域农业的现状与发展,分析了海河流域农田水循环的驱动机制,提出了海河流域农田综合二元水循环模式,揭示了农田水循环的机制,并根据农田水循环的结构与模式分析了海河流域农田水循环的各项输入输出等水平衡要素。对海河流域农田水循环模式和通量的分析结果表明,海河流域种植结构和耕作方式的改变使有效降水利用量增加,蒸散发的输出量整体增加,农业系统退水量减少。根据海河流域农田水循环模式和通量的分析结果,提出了海河流域农田水循环的调控措施,包括节水灌溉、发展旱地农业等。
Based on the present status and development of the agriculture in the Haihe River Basin, the driving mechanism of the agricultural water cycle is analyzed and the agricultural dualistic water cycle scheme is proposed in this paper. The agricultural water cycle mechanism is also presented. Water balance factors such as the input water volume, drainage water volume, plant water volume, and the evapo-transpiration were calculated according to the structure and pattern of agricultural water cycle. The analysis of the dualistic water cycle scheme and the calculated fluxes indicates that the effective utilization of precipitation and the evapo-transpiration of farmlands is increasing, and the agricultural system return flow is decreasing due to the changes of planting structure and farming mode. Based on the analyzed results, some regulation measures for the Haihe River Basin were proposed, including the water-saving irrigation as well as the dry land farming development.

[ 可能符合您检索需要的词汇 ]

进入期刊文章
根据2003-2012年用水资料,利用信息熵、方向系数和Mann-Kendall检验对海河流域用水结构特征及其演变趋势进行了研究与分析。结果表明:海河流域用水结构均衡度存在上升趋势,但趋势不显著,用水系统稳定性逐步增强。随着海河流域各类生态补水项目的实施,流域用水结构的改变主要向着生态用水方向发展。
According to data of water demand from 2003 to 2012 ,the paper analyzed the water utilization structure characteristics and evolution trend in Haihe river basin by use of information entropy , direction coefficient and Mann-Kendall test .The results showed that balanced degree of structure in the basin has rising trend which is not obvious .The stability of water utilization system gradually strengthens .With the operation of ecological water recharge projects in Haihe river basin ,the water utilization structure mainly develop towards the ecological water use .

[ 可能符合您检索需要的词汇 ]

进入期刊文章
随着经济社会迅速发展及人口增加,海河流域内人类活动的影响不断加剧,流域下垫面条件发生了明显变化。利用海河流域翔实的水文资料,采用统计分析法和Mann-Kendall秩次相关检验法,分析了人类活动及气候变化情景下海河流域暴雨洪水特征变化规律及变化趋势,认为近年来海河流域暴雨洪水呈现减少趋势。研究结果为流域洪水系列一致性修正奠定了基础,为防汛抗旱、流域防洪规划与管理提供了技术支撑。
With the rapidly economic and social development and population increase, the impacts of human activities aggravate in the H aihe River Basin, resulting in significant changes in the underlying surface conditions. Based on the hydrological data in detail in theHaiheRiverBasin,thestatisticalanalysisandMannKendallrankcorrelationtestwereusedtoanalyzethevariationruleandtrendof storm flood in the Haihe River Basin under the conditions of human activities and climate changes. The results suggested that storm flood has a decreasing trend in the basin. Research results can lay the foundations for the consistency correction of flood series and pro2 vide technical support for the planning and management of flood control and drought relief in the basin.

[ 可能符合您检索需要的词汇 ]

进入期刊文章
随着经济发展,人类活动对河流生态系统的胁迫日益强烈,生态系统健康状况受到严重威胁.本研究以海河流域2010年73个采样点的水质、营养盐和底栖动物指标为例,采用指标体系法,从化学完整性和生物完整性两方面评价了流域内河流生态系统健康.结果表明,海河流域河流生态系统健康状况整体较差,有72.6%的样点处于"极差"健康状态,同时表现出明显的地区集聚效应;河流水质与人类活动强度密切相关;海河流域水体富营养化趋势明显;流域内底栖动物多样性低,清洁物种较少.氨氮、总氮、总磷等营养盐指标是影响河流生态系统健康的关键因子,应从控制上述指标入手,遏制海河流域河流生态系统健康恶化.对于河流生态系统健康评价,多因子的综合评价法优于单因子评价法.
With the development of economy, the health of river ecosystem is severely threatened because of the increasing effects of human activities on river ecosystem. In this paper, the authors assessed the river ecosystem health in aspects of chemical integrity and biological integrity, using the criterion in water quality, nutrient, and benthic macroinvertebrates of 73 samples in Haihe River Basin. The research showed that the health condition of river ecosystem in Haihe River Basin was bad overall since the health situation of 72. 6% of the samples was “extremely bad”. At the same time, the health situation in Haihe River Basin exhibited obvious regional gathering effect. We also found that the river water quality was closely related to human activities, and the eutrophication trend of water body was evident in Haihe River Basin. The biodiversity of the benthic animal was low and lack of clean species in the basin. The indicators such as ammonia nitrogen, total nitrogen and tot

[ 可能符合您检索需要的词汇 ]

进入期刊文章
蒸发是水文循环的重要环节。利用Mann-Kendall趋势检验方法检测了海河流域1961-2006年蒸发皿蒸发量的演变趋势。结果表明:海河流域蒸发皿蒸发量呈现出显著的下降趋势。利用相关分析、偏相关分析和主成分分析方法,研究了蒸发皿蒸发量与平均气温、相对湿度、平均风速和日照时数4种气象因子之间的关系。基于这4种气象因子,建立了模拟蒸发皿蒸发量的经验公式(E-THWS公式),并利用这一公式的微分形式揭示了这4种气象因子在海河流域"蒸发悖论"中的作用。结果表明:平均气温和相对湿度对海河流域蒸发皿蒸发量的增加作用要小于平均风速和日照时数的减少作用;平均风速的下降是蒸发皿蒸发量下降的主要原因。
Evaporation is an important part of hydrological circulation .The Mann-Kendall''s trend test technique was used to detect the trend of pan evaporation in the Haihe River basin ( HRB) from 1961 to 2006 .The results showed that there is a statistically significant decreasing trend of pan evaporation in the HRB.Correlation analysis , partial correlation analysis , and principal component analysis were used to analyze the relationship between pan evaporation and four meteorological factors such as mean tempera -ture, relative humidity , wind speed and sunshine duration .The paper set up an empirical formula ( E-THWS formula ) for calculating pan evaporation based on the four meteorological factors , and announced the effect of four meteorological factors in paradox theory of pan evaporation of Haihe River basin .The results indicated that the increasing effect of pan evaporation by mean temperature and relative humidity is less than the decreasing effect of pan evaporation by ave

[ 可能符合您检索需要的词汇 ]

进入期刊文章
为了深入研究近60年来多种气候、水文要素对海河流域干旱变化的影响，采用 Mann-Kendall 非参数检验法对流域内气温、降水、径流等要素进行了分析，并采用 Z 指数法对流域的干旱特征进行了研究。结果表明：20世纪50年代以来，海河流域经历了湿润正常干旱的变化过程；21世纪初，流域北部地区出现偏旱现象，多次干旱的面积覆盖率低于40％，少部分干旱覆盖率较高，最高达98％；从时间上看，1980年是发生干旱现象的一个临界点，无论是从发生次数还是覆盖面积上，1980年以后要明显大于1980年以前。从干旱发生频率上分析，海河流域发生轻度和一般干旱的高频地区多分布在滦河流域以及北部山区，中部平原地区干旱爆发频率相对较低，重大干旱事件则在中南部平原地区发生频率更高。综合全部干旱事件，滦河流域为干旱频发区，其次为海河流域东部地区，西部地区则频率相对较低。
In order to further study the influence of various climate changes and hydrological factor on arid changes in Haihe River basin,we analyze temperature,precipitation and runoff of Haihe River basin by Mann-Kendall nonparametric tests.We also analyze the drying characteristics by the method of Z index .The results show that the drought of Haihe River basin has changed from wet to normal to dry since the 1950 s.At the beginning of the 21 st century,the northern basin became a little drought. Mostly,the area coverage is lower than 40%,but there were also some drought that covered more than 98% of the area.From the time,the 1980 was a watershed in droughts occurrence.In terms of both thefrequency and on the average coverage,it was more dry after 1980 than before.From the drought occurrence frequency,mild and general drought of Haihe River basin in high frequency distributed in the Luanhe River basin as well as the northern mountains,and in central plains region the drought frequen

[ 可能符合您检索需要的词汇 ]

进入期刊文章
采用统计分析方法研究了黄淮海流域实测径流量的变化及其对降水变化的响应关系。结果表明:黄淮海流域气温呈现显著性升高趋势,平均线性变化趋势率为0.19℃/10 a;黄河中下游及海河流域降水为非显著性减少趋势,淮河和黄河源区降水量为略增加趋势。受气候变化和人类活动的影响,黄淮海流域10个重点水文站实测径流量均呈现不同程度的减少趋势,其中黄河中下游和海河流域实测年径流量减少趋势显著。降水是河川径流变化的主导因素,黄河中下游及海河流域不同阶段降水径流关系差异明显,淮河流域不同阶段的降水径流关系差异相对较小,人类活动通过改变降水径流之间的响应关系对河川径流产生重要影响。
Adopting statistical analysis method,this paper studied on the variations of the recorded runoff and its responses to precipitation changes in the Huang-Huai-Hai river basin. The results indicate that annual temperature presents significant rising trend with mean linear rising rate of 0. 19℃/10 a;precipitation is characterized by insignificant decreasing in the Middle and Lower Yellow River and the Haihe River basin and slightly in-creasing in the source area of the Yellow River and the Huaihe River basin. Due to the influences of climate change and human activities,the meas-ured runoffs at 10 key hydrometric stations have different decline trends and the measured annual runoff decreases significantly in the Middle and Lower Yellow River and the Haihe River basin. Precipitation plays a dominant role in river runoff yield. Differences in relationships between runoff and precipitation for different phases are obvious in the Middle and Lower Yellow River and the Haihe River basin,and are

[ 可能符合您检索需要的词汇 ]

进入期刊文章
基于因子分析对2012～2013年海河流域pH、DO、COD、BOD5、氨态氮和总石油烃等6项水质指标的监测数据进行统计，并对其中四项指标进行水污染综合指数评估，旨在对海河水质进行较为系统的评价。结果显示，BJ1和HB2两个站位水质属于Ⅳ类标准，其余各站位均为Ⅴ类；各站位综合评价结果得到海河流域指数为1.44，说明海河流域处于污染状态，其污染程度超过该流域功能区的标准。因子分析发现， COD、DO和NH3-N之间差异显著（P<0.05）；主成分分析显示，除pH和BOD5外，其余指标都在0.70以上；COD、DO、NH3-N 和TPH 的贡献率较高，其中总石油烃的贡献率为100%，因此可以认为该海域的污染类型属于有机污染，且石油烃污染较为突出。
Selecting six indexs of pH, DO, COD, BOD5, ammonia nitrogen and petroleum hydrocarbons in Haihe River Basin of four seasons in 2012-2013 for factor analysis, appling Water Quality Pol ution Index (API) to evaluate DO, COD, BOD5 and ammonia nitrogen, aims for systematic evluation to water quality of Haihe River Basin. The results showed that two stations of BJ1 and HB2 were theⅣtype of water, others were theⅤtype;Water Quality Pollution Index (API) was 1.44, which il ustrated Haihe River Basin in the state of contamination that the degree of pol ution exceeded the standard of functional areas. Factor Analysis explained that between COD, DO and NH3-N were significant difference(P<0.05);principal component analysis showed that, in addition to pH and BOD5, the other indicators were above 0.70;the contribution rate of COD, DO, NH3-N and TPH were higher, petroleum hydrocarbons was 100%, it can be considered that the waters type of pol ution was organic pol ution, and petroleum hy

[ 可能符合您检索需要的词汇 ]

进入期刊文章
利用1961～2010年海河流域内及其周边51个站的降水、气温、相对湿度、风速、日照时数等气候因子日数据,采用相对湿润度指数方法揭示了流域50年不同等级干旱的时空演变规律,并剖析干旱与气候变化的关系;再利用小波分析法研究流域相对湿润度指数距平的周期变化规律,预测海河流域未来的干旱化趋势。结果表明：时间上,流域轻旱频率最高,年代际变化上总体趋向干旱化;空间上,东北部为轻旱频发区;西北部的中旱频率较高;重旱主要集中于张家口、忻州、邢台等周边地区;流域降水量和蒸发量的年代/年代际变化呈双降趋势,且后者减小速率相对较小,区域整体干旱化有减弱趋势。流域相对湿润度指数距平的时间序列存在10年尺度的显著变化周期,预计到2017年间海河流域总体仍处于干旱化阶段。
Based on the relative moisture index and daily climatic data of 51 meteorological stations from 1961 to 2010,spatiotemporal trend of different grade drought,the relationship between drought and climate change were revealed.And with Morlet wavelet transform,variation period of anomaly annual relative moisture index time series was analyzed,then future tendency of drought in Haihe River basin was predicted.The results indicated that on the temporal distribution,there had a significant increasing drought trend in decadal variation,light drought frequency was the largest.On the spatial distribution,large light drought was frequently occurred in the northeast river basin,the moderate drought was frequently occurred in northwest river basin,heavy droughts occurred in the areas of Zhangjiakou,Xinzhou and Xingtai.The mean annual and decadal precipitation and evaporation had decreased,the linear decreasing rate of evaporation was slower than that of precipitation.It was a weak increasing drough

[ 可能符合您检索需要的词汇 ]

进入期刊文章
对新安江模型进行了完善，得到了全新的新安江－海河模型，分别运用新安江模型和新安江－海河模型，对1958—2004年阜平流域进行了产汇流模拟。结果表明：不管是新安江模型还是修正后的新安江－海河模型，模拟精度都比较高，尤其是在洪水分年代与分量级模拟时，但是新安江－海河模型中各个参数的取值更能反映实际的产汇流情况，模型结构更加完善。
This study applied the Xin’anjiang-Haihe model that was gained by improving Xin’anjiang model to Fuping watersheds. Hydrometeoro-logical data from 1958 to 2004 were selected as objects of study where Xin’anjiang model and Xin’anjiang-Haihe model were applied to simulate the runoff yield and concentration process. The results show that the Xin’anjiang-Haihe model has the same accuracy as it of Xin’anjiang model in the condition that floods are divided with periods and magnitudes and are simulated respectively,while its parameter values are more reasonable.

[ 可能符合您检索需要的词汇 ]