陜南后溝小流域泥沙與總氮隨徑流輸移特征
發(fā)布時間：2019-08-12 15:27
【摘要】：以2011-2012年汛期野外降雨資料為基礎(chǔ),分析陜南后溝小流域泥沙和總氮(TN)隨徑流流失特征。研究結(jié)果表明,坡耕地、退耕地、菜地泥沙流失通量與徑流量擬合方程采用S形曲線方程表達較為合適;果園采用線性函數(shù)反映兩者之間的關(guān)系。坡耕地和菜地徑流量與TN濃度采用倒數(shù)曲線表達,而果園和退耕地采用線性函數(shù)表達;汛期不同土地利用類型土壤流失通量順序為:菜地(4 011.7kg/hm2)坡耕地(1 720.0kg/hm2)退耕地(1 606.3kg/hm2)果園(776.3kg/hm2);徑流中TN流失通量順序為:菜地(15.29kg/hm2)退耕地(7.20kg/hm2)坡耕地(4.92kg/hm2)果園(1.37kg/hm2)。2011-2012年汛期后溝小流域出口徑流動能與泥沙量流失量采用線性函數(shù)和冪函數(shù)描述兩者之間關(guān)系,而TN流失量與徑流動能采用對數(shù)函數(shù)和冪函數(shù)表示。汛期末期階段泥沙和TN流失風險最大。
[Abstract]:Based on the field rainfall data of the flood season in the period of 2011-2012, the characteristics of sediment and total nitrogen (TN) of the small watershed in the south of the southern Shaanxi Province are analyzed with the runoff loss. The results show that the equation of S-shaped curve is suitable for the runoff and runoff of the cultivated land, the cultivated land and the vegetable, and the relationship between the two is reflected by the linear function of the orchard. The runoff and TN concentration of the slope land and the vegetable field were expressed by the reciprocal curve, while the orchard and the cultivated land were expressed by linear function; the flux order of the soil loss in different land use types in the flood season was: (4, 011.7 kg/ hm2) of the slope land (1 720.0 kg/ hm2) and the uncultivated land (1606.3kg/ hm2) of the orchard (776.3kg/ hm2); The sequence of TN loss flux in runoff is: (15.29 kg/ hm2) of cultivated land (7.20 kg/ hm2) and (4.92 kg/ hm2) of orchard (1.37 kg/ hm2). And the TN loss and the kinetic energy of the runoff are expressed by a logarithmic function and a power function. At the end of the flood season, the risk of sediment and TN loss is the greatest.
【作者單位】： 綿陽師范學院;中國科學院水利部水土保持研究所;西安理工大學;西華師范大學;
【基金】：國家自然科學基金項目(41471226) 中國博士后科學基金項目(2014M562338) 綿陽師范學院博士科研啟動項目(QD2014A002);綿陽師范學院青年基金項目(2013B09) 四川省教育廳項目(16ZB0311)
【分類號】：S157.1
本文編號：2525797
[Abstract]:Based on the field rainfall data of the flood season in the period of 2011-2012, the characteristics of sediment and total nitrogen (TN) of the small watershed in the south of the southern Shaanxi Province are analyzed with the runoff loss. The results show that the equation of S-shaped curve is suitable for the runoff and runoff of the cultivated land, the cultivated land and the vegetable, and the relationship between the two is reflected by the linear function of the orchard. The runoff and TN concentration of the slope land and the vegetable field were expressed by the reciprocal curve, while the orchard and the cultivated land were expressed by linear function; the flux order of the soil loss in different land use types in the flood season was: (4, 011.7 kg/ hm2) of the slope land (1 720.0 kg/ hm2) and the uncultivated land (1606.3kg/ hm2) of the orchard (776.3kg/ hm2); The sequence of TN loss flux in runoff is: (15.29 kg/ hm2) of cultivated land (7.20 kg/ hm2) and (4.92 kg/ hm2) of orchard (1.37 kg/ hm2). And the TN loss and the kinetic energy of the runoff are expressed by a logarithmic function and a power function. At the end of the flood season, the risk of sediment and TN loss is the greatest.
【作者單位】： 綿陽師范學院;中國科學院水利部水土保持研究所;西安理工大學;西華師范大學;
【基金】：國家自然科學基金項目(41471226) 中國博士后科學基金項目(2014M562338) 綿陽師范學院博士科研啟動項目(QD2014A002);綿陽師范學院青年基金項目(2013B09) 四川省教育廳項目(16ZB0311)
【分類號】：S157.1
【相似文獻】
相關(guān)期刊論文 前3條
1 吳淑芳;吳普特;宋維秀;卜崇峰;;黃土坡面徑流剝離土壤的水動力過程研究[J];土壤學報;2010年02期
2 朱顯謨;黃土高原水蝕的主要類型及其有關(guān)因素[J];水土保持通報;1982年03期
3 ;[J];;年期
相關(guān)博士學位論文 前1條
1 蘇濤;砒砂巖地區(qū)EN-1固化劑固化邊坡抗沖穩(wěn)定性的機理[D];西北農(nóng)林科技大學;2011年
相關(guān)碩士學位論文 前1條
1 尹武君;黃土坡面土壤侵蝕能量描述[D];西北農(nóng)林科技大學;2012年
，本文編號：2525797
本文鏈接：http://sikaile.net/kejilunwen/nykj/2525797.html
最近更新
教材專著
