historic flood 中文意思是什麼
historic flood
解釋
歷史洪水-
The main process of regional ecological risk assessment includes 5 stages : regional analysis, risk receptor selection, risk sources analysis, exposure and hazard analysis, and integrated risk assessment. arming at flood, drought, storm tide, petroleum pollution accident and flow breaking in the lower huanghe river, the probability and distribution of each kind of risk sources are evaluated. the authors bring forward indexes and formulas to measure hazarded degree and risk value of ecosystem. by using remote sensing data, historic record, survey data and by means of geographical information system, regional ecological risk assessment is finished. on the basis of assessment result, the environmental risk management countermeasure of the huanghe river delta is advanced
以黃河三角洲為例進行了區域生態風險評價理論和方法的探討。針對黃河三角洲主要生態風險源洪澇乾旱風暴潮災害油田污染事故以及黃河斷流的概率進行了分級評價並提出度量生態損失與生態風險的指標和公式，分析了風險源的危害作用運用遙感資料歷史記錄調查數據和地理信息系統gis技術，完成了區域生態風險綜合評價在此基礎上提出黃河三角洲的區域生態風險管理對策。 -
Human being has concerned about flood for a long time, either in remote antiquity times, or in modern times in which modern technology and economy highly developed and modern civilization flourishing, either in a developed country, or in a developing country, there are all some historic records about the disasters of the flood
人類對洪水的關注由來已久，無論是在歷史遙遠的古代，還是在現代技術、經濟高度發達、現代文明相當繁榮的今天；無論是發達國家，還是發展中國家，都有遭受洪水侵襲的歷史記載。迅猛的洪水，使人類的生命財產和生存環境遭受巨大的損失。 -
Therefor whenever the flood was coming, it is very important that we were prepared to control flood at any moment and safeguard our lives and property and did our best to minimized the damage by some science means, the dss of controlling the flood this paper introduced ought to reflect flood disaster real - timely, list all feasible projects by referring to historic experiences and pre - making plans, find out the optimization of all projects by integrated evaluating for decision maker
因此，當洪水到來時，作好防洪準備，採取有效措施，隨時保護人民的生命財產的安全，盡量把損失降低到最低程度，意義十分重大。防洪決策支持系統的建立，必須能為決策者展現洪災實時的具體情況，參照歷史經驗和預先制定的防洪預案，列出適合當前洪水狀態的全部防洪方案可行集，利用綜合評價方法求出洪災損失最小的最優防洪方案。 -
With the meteorological and hydrographic data in songhuajiang and nenjiang valley from 1951 to 1995, using correlation analysis and empirical orthogonal analysis, the rule of the flood and relation between flood and precipitation distribution in this region are discussed. the results show that periodic change of water level is obvious in this region. now water level is in the serious stage from 1980 ' s. there are great relation between the water level of flood period and the precipitation. the unusual precipitation of nenjiang valley has greater impact than that of second songhuajiang valley. at the summer in 1998, songhuajiang and nenjiang valley encountered the ghastly flood and the reason for that is the anomalous precipitation great exceeding the historic maximum
利用松花江，嫩江流域1951 1995年期間的氣象和水文資料，採用相關分析，經驗正交分析等方法，討論了該流域洪澇發生的規律及其與流域內降水分佈的關系.文章指出，江流域的水位變化有明顯的階段性，且具有全流域一致的特性，目前正處在80年代以來洪澇較嚴重的階段;嫩江流域降水異常偏多對松花江洪澇的影響比第二松花江的作用要大; 1998年夏季，松花江，嫩江流域出現超歷史紀錄特大洪水的關鍵原因是嫩江流域6 8月的降水距平百分率遠遠超過了歷史上的的最大值 -
A preliminary study on laws of soil and water losses in gneiss, which is the main type of rocks in taihang, was carried out in this paper on the bases of examination data, survey of flood and historic statistic data
根據試驗觀測數據和洪水災害考察結果，結合歷史統計資料，對河北太行山的主要類型巖石片麻巖低山區的水土流失特點進行了初步研究。 -
The thesis reviews the historic and present situations of the yellow river, makes factor analysis for ice flood, simulates and forecasts freeze - up time and break - up time on the basis of fuzzy set theory. the results are reasonable and precise. in the end, the knotty problems are given to obtain feedback information for the future researches
因此，在研究影響河流冰情的熱力因素、動力因素、河勢因素的基礎上，進行凌汛成因分析並對封河日期、開河日期的預報模型做深入探討，既有理論價值，也有應用意義。 -
Systematic analysis on factors of historic flood disaster on lower reaches of yellow river
影響歷史黃河水患因素的綜合分析
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