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    Water-Sand State of River and Soil Erosion in the Basin
    河流水沙状况与流域土壤侵蚀
    The extension length of seaside delta (AL) can be obtained on the basis of the position of the change of course, seaside condition and deposition state as follows:旹rrors between calculating results and measured values, AL are within 10%, standard error S \x\ =78.2m, and standard error of the increment or decrement of stages only 0.009m.
    滨海区三角洲的延伸状况(△L),依改道部位、海域条件和淤沙状况按下式求得 计算结果与实测值的误差△L在±10%以内,标准误差S|x|=78.2m,水位升降的标准误差仅为0.009m.
    The relation between the deposition feature and concentration was not obvious. The sand-barrier of the most deposition was 1×1m scale among different scales sand-barrier either in horizon or in 30° slope, the more was 1.5×1.5m, and 2×2m was the least.
    积沙状况与浓度关系不明显 ,水平放置与坡面 ( 30°)放置时均以 1× 1 m规格的沙障积沙最多 ,1 .5× 1 .5 cm次之 ,2×2 cm最差。
    (1) Sediment discharge is obviously differentiated at regional scales. Mountainous regions in northern Hebei and western Liaoning, Yanbei Plateau, Loess Plateau, hills in the middle of Sichuan, South-West Plateau and hills south of Huihe are marked with serious erosion and high sediment discharge, while hills in southern of China and small hills in the north-east have little sediment discharge.
    分析表明:(1)我国输沙状况表现出明显的宏观分异规律,冀北辽西山地、雁北高原、黄土高原、川中丘陵、西南高原山地和淮南丘陵,存在明显侵蚀高值地区;
    This paper gives proposal of the reasonable distribution and use of the water and sand resources.
    本论文在对策与建议中提出了黄河口水沙资源的合理分配与利用,近50年来,黄河入海水沙状况已经发生巨大变化,三角洲海岸冲淤也发生相应变化。
    This article made an analytical study from 5191 cases of students from colleges rnd secondary schools for professional training in Xining with bad eyesight and rtochoma.
    本文分析讨论了西宁市大中专5191名学生视力不良及眼沙状况
    We use the equation of water balance and the relationship between vegetation and sediment yield are used to research the water balance on runoff plot, the influence of vegetation on sheet erosion, and sediment and runoff yield on plot;
    片蚀实以细沟状侵蚀为主,并通过水量平衡方程、植被和产沙关系,对径流小区水量平衡,植被对片蚀的影响,小区产流、产沙状况作了探讨。
    Scouring is taking place when sediment consentration of the flow is higher than 600kg/m~3 or less than 100 kg/m~3, and siltation occurs when sediment consentration is in a range of 100~600 kg/m~3. Therefore the regulirity of the sediment delivery and annual sediment load at the outlet section of the river cannot reflect a real regime of sediment yield on the river basion.
    含沙量在100~600kg/m~3之间时,河床发生淤积。 因此,受冲淤变化的影响,皇甫站断面年输沙量并不一定能反映该年的流域产沙状况
    Then, it was demonstrated that the runoff and sediment state in the Yellow River,at present,was influenced by artificial factors such as society and economy to a great extent,besides be restricted by physical factors.
    进而指出,当今黄河的水沙状况除受自然因素制约外,已在很大程度上为社会、经济等人为因素所影响。
 

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