發(fā)布時(shí)間：2018-09-10 12:40

【摘要】：為了解在全球氣候變化背景下,流域氮磷輸出對(duì)雨溫條件變化的響應(yīng),選取我國三江平原典型低溫農(nóng)區(qū),在詳細(xì)分析1975—2014年歷史氣象數(shù)據(jù)的基礎(chǔ)上,利用SWAT模型,明確了阿布膠河流域的氮磷流失特征。結(jié)果表明:研究區(qū)近40年日平均氣溫以0.132℃·10a~(-1)的微弱趨勢上升,降水量自20世紀(jì)80年代開始呈下降趨勢,總減少量不超過140 mm,且年際差異較大(11.60~415.50 mm);N、P輸出與降水量顯著正相關(guān),豐水年的輸出量分別是枯水年的1.5、2.5倍,且對(duì)降水變化的敏感性隨降水量升高而降低;N、P輸出總體與溫度呈負(fù)相關(guān),隨溫度的變化率分別為0.937 kg·hm~(-2)·℃~(-1)和0.161 kg·hm~(-2)·℃~(-1)。多年氮磷輸出量在溫度升高和降水減少的情勢下上升,表明人為因素對(duì)污染輸出可能產(chǎn)生更大影響,未來在低溫農(nóng)區(qū)開展面源氮磷輸出對(duì)氣候響應(yīng)的針對(duì)性研究中有必要考慮自然和人為效應(yīng)的區(qū)分。
[Abstract]:In order to understand the response of nitrogen and phosphorus output to the change of rain temperature under the background of global climate change, the typical low-temperature agricultural area of Sanjiang Plain in China was selected. Based on the detailed analysis of historical meteorological data from 1975 to 2014, the SWAT model was used. The characteristics of nitrogen and phosphorus loss in Abu Chao River basin are clarified. The results show that the daily average temperature of the study area in the past 40 years has risen slightly at 0.132 鈩，

本文編號(hào)：2234475