ass日本风韵熟妇pics男人扒开女人屁屁桶到爽|扒开胸露出奶头亲吻视频|邻居少妇的诱惑|人人妻在线播放|日日摸夜夜摸狠狠摸婷婷|制服 丝袜 人妻|激情熟妇中文字幕|看黄色欧美特一级|日本av人妻系列|高潮对白av,丰满岳妇乱熟妇之荡,日本丰满熟妇乱又伦,日韩欧美一区二区三区在线

雨型對(duì)東北典型黑土區(qū)順坡壟作坡面土壤侵蝕的影響
CSTR:
作者:
作者單位:

作者簡(jiǎn)介:

通訊作者:

中圖分類號(hào):

基金項(xiàng)目:

國(guó)家自然科學(xué)基金項(xiàng)目（41571263）


Effects of Rainfall Patterns on Hillslope Erosion with Longitudinal Ridge in Typical Black Soil Region of Northeast China
Author:
Affiliation:

Fund Project:

  • 摘要
    • |
  • 圖/表
    • |
  • 訪問(wèn)統(tǒng)計(jì)
    • |
  • 參考文獻(xiàn)
    • |
  • 相似文獻(xiàn)
    • |
  • 引證文獻(xiàn)
    • |
  • 資源附件
    • |
  • 文章評(píng)論
    摘要:

    基于人工模擬降雨試驗(yàn),，研究了雨型對(duì)東北黑土區(qū)順坡壟作坡面土壤侵蝕的影響。根據(jù)典型黑土區(qū)侵蝕性降雨標(biāo)準(zhǔn)及雨型特征,，試驗(yàn)設(shè)計(jì)了總降雨量相同（降雨量為87.5 mm）的5種不同雨型,，即增強(qiáng)型（降雨過(guò)程中降雨強(qiáng)度分布為50-75-100-125 mm/h）,、減弱型（降雨過(guò)程中降雨強(qiáng)度分布為125-100-75-50 mm/h）,、峰值型（降雨過(guò)程中降雨強(qiáng)度分布為50-75-100-125-100-75-50 mm/h）,、谷值型（降雨過(guò)程中降雨強(qiáng)度分布為100-75-50-75-100 mm/h）和均勻型（降雨過(guò)程中降雨強(qiáng)度保持75 mm/h不變），以及1個(gè)坡度（即順坡壟作改橫坡壟作的臨界坡度5°）,。結(jié)果表明，受前期預(yù)降雨的影響,，各雨型處理的順坡壟作坡面徑流量差異較小,，但坡面侵蝕量存在明顯差異，其中峰值型雨型引起的坡面侵蝕量最大,，分別是谷值型,、減弱型、均勻型和增強(qiáng)型雨型處理下的1.20,、1.63,、1.78、1.80倍,。引起侵蝕量較大的雨型（峰值型,、谷值型和減弱型）在典型黑土區(qū)天然降雨中出現(xiàn)頻次超過(guò)70%，這可能是該區(qū)夏季順坡壟作坡面侵蝕作用強(qiáng)烈的重要原因之一,。同一降雨強(qiáng)度在不同雨型中出現(xiàn)的時(shí)序不同,，其產(chǎn)生的徑流量和侵蝕量對(duì)總徑流量和總侵蝕量的貢獻(xiàn)率也不相同。除125 mm/h外,，同一降雨強(qiáng)度出現(xiàn)在起始階段產(chǎn)生的侵蝕量對(duì)坡面總侵蝕量的貢獻(xiàn)率顯著大于其出現(xiàn)在其他階段對(duì)坡面總侵蝕量的貢獻(xiàn)率,。

    Abstract:

    Longitudinal ridge, as one of the main tillage management, causes severe soil erosion on hillslope scale and makes great contribution to the soil loss in typical black soil region of Northeast China. Rainfall pattern is one of the main factors influencing hillslope erosion. The simulated experimental study was conducted to investigate the effects of rainfall patterns on hillslope erosion with longitudinal ridge in the typical black soil region. According to the erosive rainfall standard and rainfall pattern characteristics of natural rainfalls in the typical black soil region, the experimental design included five patterns of simulated rainfalls with the same total rainfall amount of 87.5 mm, covering intensive-type (rainfall intensity distribution was 50-75-100-125 mm/h), reduced-type (rainfall intensity distribution was 125-100-75-50 mm/h), peak-type (rainfall intensity distribution was 50-75-100-125-100- 75- 50 mm/h), valley-type (rainfall intensity distribution was 100-75-50-75-100 mm/h) and uniform-type (rainfall intensity was 75 mm/h), and the slope gradient was 5° which was the critical slope gradient of changing longitudinal ridge to contour cultivation. The results showed that total runoff volume had little difference among five rainfall patterns, while obvious differences in soil loss were observed. Soil loss of the peak-type treatment was 1.20, 1.63, 1.78 and 1.80 times higher than those of the valley-type, reduced-type, uniform-type and intensive-type treatments, respectively. Occurring frequency of three rainfall patterns (peak-type, valley-type and reduced-type) occupied more than 70% of total natural rainfall events, which could be one of the key reasons caused severe hillslope soil erosion with longitudinal ridge in this region. The time sequences of rainfall intensity in each rainfall pattern had great effects on runoff, soil erosion and their contribution rates to total runoff and soil loss. Except for 125 mm/h rainfall intensity, rainfall intensities occurred at the initial stage of the rainfall pattern had more contributions to total soil loss, compared with the rainfall intensities appeared at the middle stage and the end stage.

    參考文獻(xiàn)
    相似文獻(xiàn)
    引證文獻(xiàn)
引用本文

鄭粉莉,邊鋒,盧嘉,覃超,徐錫蒙.雨型對(duì)東北典型黑土區(qū)順坡壟作坡面土壤侵蝕的影響[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2016,47(2):90-97. Zheng Fenli, Bian Feng, Lu Jia, Qin Chao, Xu Ximeng. Effects of Rainfall Patterns on Hillslope Erosion with Longitudinal Ridge in Typical Black Soil Region of Northeast China[J]. Transactions of the Chinese Society for Agricultural Machinery,2016,47(2):90-97.

復(fù)制
分享
文章指標(biāo)
  • 點(diǎn)擊次數(shù):
  • 下載次數(shù):
  • HTML閱讀次數(shù):
  • 引用次數(shù):
歷史
  • 收稿日期:2015-08-11
  • 最后修改日期:
  • 錄用日期:
  • 在線發(fā)布日期: 2016-02-25
  • 出版日期:
文章二維碼