drought degree 中文意思是什麼
drought degree
解釋
乾旱等級-
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。 -
Under drought conditions, the decreasing degree of transpiration rate and the conduction of stoma is a. ginnala > m. baccata > p. ussuriensis > p. davidiana
在乾旱脅迫條件下，茶條槭蒸騰速率和氣孔導度降低幅度最大，山荊子、山梨次之，山桃最小。 -
Meteorological disaster ( mainly wind damagae, waterlog disaster and drought damage ) was classified by five categories as slight, not serious, medium, relatively serious and serious by the degree of its influence on guangzhou, and divided into 3 ranges in time : short - term ( 2000 2002 ), medium - term ( 2003 2006 ), and long - term ( 2007 2010 ). through the investigation by 57 experts who had been engaged in disatser research for a long time, with application expert of assessment method ( delphi method ) the results showed that wind damage would have the greatest influence on guangzhou among the meteorological disasters. in the coming 10 years, there would be tropical cyclone influence on guangzhou almost every year, which would bring a certain extent of damage that was 10 15 % more serious than that in normal year. waterlog disaster brings less influence compared them with tropical cyclone in short term, but its influence was close to that of tropical cyclone in mid - term and even surpasses that of tropical cyclone in long - term. waterlog damage in forcasting period will be about 10 % more serious than that in normal year
將氣象災害（主要是風災、澇災和旱災）對廣州市的影響程度分成輕微、偏輕、中等、偏重和嚴重五個級別，在時間上將未來10年分成三個時期：近期（ 2000 2002年） 、中期（ 2003 2006年） 、遠期（ 2007 2010年） ，通過對廣州市57名長期從事災害研究的專家的調查，再運用專家評估法，結果表明：在三種災害中，對廣州市影響最大的是風災，未來10年幾乎每年都有熱帶氣旋影響廣州，造成較大程度的損失，其損失程度約比中等年份偏多10 15 ;澇災對廣州市的影響在近期比臺風小，中期與臺風的影響接近，至遠期的影響超過臺風，整個預測期內比中等年份偏多10左右。 -
Under the worse situation of worldwide shortage of fresh water, china, as one of the 13 countries with lowest per capita occupancy in water resources, has 330 cities are short of water ; an average of 26. 68 million hectares farmland in drought annually but also a loss of billions of rmb properties due to the floodwater every year ; 82 % rivers and lakes suffered from pollution in different degree ; 2800 km river without any aquatic ; 25, 000km ' s water unqualified by fishery water quality standard
在全球淡水資源日益緊張的形勢下，我國作為世界人均水資源13個貧困國家之一，有330個缺水城市，每年平均有4億畝農田受旱，每年洪災要造成數以千億的經濟損失，有82 %的江河、湖泊受到不同程度的污染， 2800多公里的河段魚蝦基本絕跡， 2 . 5萬公里的河流水質超過漁業水質標準。 -
The indexes systems of drought - resistance identification were established quantitative analyzing with methods of grey correlation degree, subordinate function values and systematic analysis of clustering
在研究結果的數量分析過程中借引了灰色系統理論及灰色關聯度分析法，以及隸屬函數值法等數學統計分析方法對玉米抗旱性鑒定指標進行評價。 -
On the other side, it analyses the in fluence degree of human factor on the losses of agricultural drought
秀山縣農業旱災中人為因素的定量分析另一方面，分析人為因素對旱災災情的影響程度。 -
The computed palmer drought index of 124 stations in the north of china are used to analyse some charactersin this region, including the main drouthy years and its severity, the drought range, etc. we also analyse the main drouthy periods, the frequency of each drought degree, the main area and the drought cycle in northwest china, north china and northeast china. on the base of the further modification of palmer drought severity model, a daily palmer drought severity model are developed. lt indicated that the daily drought index is accordant with the monthly drought index, and can reflect the change of severity in detail
應用進一步修正的帕默爾旱度模式計算的我國北方地區124個站點的40年逐月旱度值，分析了我國北方地區的一些乾旱特徵，包括北方地區旱情較重的大旱年及其嚴重程度、主要乾旱區；華北、西北和東北地區各等級乾旱發生頻率、主要乾旱時段、乾旱周期等，為防旱抗旱提供了科學依據。 -
The forth chapter recognizes the rice drought characters and degree, describes and analyzes the rice drought loss, summarizes the households " coping strategies in southern china
第四章認識中國南方水稻乾旱的特徵和程度，描述並分析了水稻乾旱損失及對農戶的影響；總結農戶水稻乾旱風險處理策略。 -
( 3 ) the mean features of vapor water in the atmosphere in the east of nwc between during the great drought affair and dry years are contrasted and shows that, the precipitable water in the whole troposphere is evidently reduced, and the vapor transport is also weakened, the degree of convergence of water vapor is lessened
（ 3 ）對比西北地區東部重大幹旱事件期間和典型濕年大氣水分平均特徵發現：干年西北地區東部全區整層大氣可降水量明顯少於濕年，且水汽輸送減弱，水汽輻合程度也有所減小。 -
Abstract : spraying chemical controlling matter ( drought - resistant agent ) on wheat blade in medium - late growth period. we found it influenced transpiration rate, water - retaining capacity, containing water content of dry weight, seeping conductive rate, chlorphyll content and so on in different degree, and improved the moisture content stage of wheat, reduced the seeping of electrolyte, have an obvious effect on delaying decrepit and increasing production
文摘:小麥生育中後期葉面噴施化學調控物質（抗旱劑） ，對蒸騰速率、保水力、干重含水量、外滲電導率和葉綠素含量等均有不同程度的影響，明顯地改善了小麥的水分狀況，降低了電解質的外滲率，有明顯的保綠延緩衰老的作用，增產效果顯著。 -
The results with grey correlative degree analysis showed that chlorophyll content, water potential of leaves, relative water content and electric conductivity can be regarded as the important indexes of drought resistance evaluation of the species
關聯度分析結果表明：葉綠素含量、葉水勢、葉片相對含水量以及電導率可作為3樹種重要的抗旱評價指標。
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