亚洲日韩在线视频,亚洲成AV人片乱码色午夜男男,色9月婷婷A级,五月婷婷丁香视频在线

<legend id="jlhmg"><u id="jlhmg"><blockquote id="jlhmg"></blockquote></u></legend>
      • <legend id="jlhmg"></legend>
      • <legend id="jlhmg"><u id="jlhmg"><thead id="jlhmg"></thead></u></legend>
            綜合治理

            黃土高原地區(qū)水土流失的防治途徑

            來源: 水土保持生態(tài)環(huán)境建設(shè)網(wǎng)   上傳日期:2003-11-18   打印本文章   【字體】 大   中   小  
                 摘要:黃土高原地區(qū)由于其特殊的地質(zhì)、地形地貌以及氣候條件、人類活動(dòng),使之成為土壤侵蝕強(qiáng)烈、類型復(fù)雜、時(shí)空分布集中的嚴(yán)重水土流失區(qū),面積達(dá)64萬km2,其范圍覆蓋了幾乎整個(gè)黃河中游地區(qū)和上游地區(qū)的大部,占黃河流域面積的80.5%,是黃河泥沙的來源區(qū)。要治理和開發(fā)黃河,必須加強(qiáng)黃土高原地區(qū)的水土流失防治。本文介紹了黃土高原水土流失的基本情況、目前的治理情況,最后提出了治理措施。
            Approach of Preventing Soil and Water Loss in the Loess Plateau
            Abstract: The Loess Plateau,due to special natural condition and long-term human activities,becomes severe soil and water loss area with intense soil erosion,complicated category,concentrated spatial and temporal distribution,and the  main source of sediment yield.To harness and develop the Yellow River,prevention and control of soil and water loss on the Loess Plateau should be strengthened.The paper puts forward the concept of harmony of nature and people,it also normalizes human being''''s construction activities and prevention behaviors in the light of law;a large area of vegetation can be restored by natural regeneration capability;by the comprehensive rehabilitation to improve ecological environment,relying on scientific and technological management to increase soil conservation and ecological consruction benefit.The basic approach of harnessing soil and water loss is three strategies with ten measures as following“taking prevention control as main task, taking protection as the top priority”,“strengthening rehabilitation and emphasizing the focus”,“creating new mechanism,normalizing management”to identify ten-year target of prevention and control.

            最近更新

            微信 歡迎關(guān)注水土保持生態(tài)建設(shè)微信公眾號(hào)