本文選題：沙棘“柔性壩” + 砒砂巖區(qū)�。� 參考：《水土保持學(xué)報(bào)》2017年05期

【摘要】：為了進(jìn)一步研究沙棘"柔性壩"對砒砂巖溝道泥沙的影響,基于內(nèi)蒙古砒砂巖地區(qū)沙棘"柔性壩"野外試驗(yàn),根據(jù)單座沙棘"柔性壩"一次降雨淤積后的試驗(yàn)數(shù)據(jù),運(yùn)用對比分析的方法,研究了沙棘"柔性壩"對砒砂巖溝道泥沙粒徑分布及有機(jī)質(zhì)的影響及其攔沙效果。結(jié)果表明:單座沙棘"柔性壩"能夠提高砒砂巖溝道泥沙有機(jī)質(zhì)含量,具有淤粗排細(xì)的分選功能和良好的攔沙效果。泥沙有機(jī)質(zhì)從沙棘"柔性壩"上游到下游逐漸增加,沿泥沙剖面表現(xiàn)出先增后減的趨勢;泥沙粒徑從溝道上游到下游先增大后減小,沿一次降雨淤積的泥沙剖面也表現(xiàn)出先增后減的趨勢;暴雨后沙棘"柔性壩"單位面積淤積泥沙的平均厚度為0.369m,與對比溝相比,淤積的泥沙厚度明顯較高。
[Abstract]:In order to further study the influence of seabuckthorn "flexible dam" on the silt in the channel of arsenitic sandstone, based on the field test of the "flexible dam" of seabuckthorn in Inner Mongolia, according to the experimental data of single seabuckthorn "flexible dam" after one rainfall deposition, The effect of "flexible dam" of seabuckthorn on sediment particle size distribution and organic matter distribution in the channel of arsenitic sandstone and its effect on sediment retention were studied by means of comparative analysis. The results show that the single seabuckthorn "flexible dam" can increase the content of organic matter of sediment in the channel of arsenopyrite, and has the function of separating silt, coarse and fine, and the good effect of sediment retention. The organic matter of sediment increases gradually from the upstream to the downstream of the seabuckthorn "flexible dam", and along the sediment profile it shows a trend of first increasing and then decreasing, and the grain size of sediment increases first and then decreases from the upstream to the downstream of the channel. The sediment profile along a single rainfall also shows a tendency of increasing first and then decreasing, and the average thickness of sediment deposition per unit area of seabuckthorn "flexible dam" after heavy rain is 0.369 m, which is obviously higher than that of contrast gully.
【作者單位】： 西北大學(xué)城市與環(huán)境學(xué)院;西安理工大學(xué)西北旱區(qū)生態(tài)水利工程國家重點(diǎn)實(shí)驗(yàn)室培育基地;
【基金】：國家自然科學(xué)基金項(xiàng)目(51279163) 西北旱區(qū)生態(tài)水利工程國家重點(diǎn)實(shí)驗(yàn)室培育基地項(xiàng)目(2016KFKT-4)(西安理工大學(xué)) 陜西省自然科學(xué)基金項(xiàng)目(2010JQ5003)
【分類號】：S157.43

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