不同措施下粉煤灰产流产渣研究

发布时间：2018-04-30 05:43

本文选题：粉煤灰 + 降雨特征　；参考：《水土保持学报》2016年01期

【摘要】：利用径流小区观测法,对裸露、覆表土撒播草灌、撒播草灌3种处理的粉煤灰在自然降雨条件下的产流产渣进行定量分析,研究不同降雨条件下产流产渣的特征,并对不同措施进行效益评价。结果表明:(1)观测期内总降雨量为1 635.3mm,总降雨历时为791.09h,降雨集中在4—9月,降雨量为1 160mm,累积降雨侵蚀力达到7 216.22(MJ·mm)/(hm~2·h),占全年的92.41%。7月降雨量最大,达到409.60mm,平均雨强为4.61mm/h,I30最大到67.2mm/h;降雨以大雨、暴雨为主,降雨量达828.9mm,占50.69%。(2)产流产渣集中在4—9月,3种措施产流量分别为1.67,2.27,1.49m~3,产渣量分别为0.39,1.39,0.33kg,7月产流产渣最多,分别为0.72,1.06,0.67m~3和0.30,0.90,0.21kg;3种措施暴雨的产流产渣量最多,分别为0.82,1.16,0.80m~3和0.19,0.62,0.17kg;(3)降雨量与产流产渣的相关性最大,其次为I30、再次为降雨侵蚀力,与降雨历时相关性最小。产流产渣与降雨量、I30呈多项式函数关系,与降雨侵蚀力呈线性关系,与降雨历时线性关系不明显,产渣与产流呈多项式函数关系。(4)覆表土撒播草灌小区产流量、产渣量、侵蚀总量均最大,分别为2.98m~3,1.59kg,31.81t/hm~2,裸露小区次之,分别为2.24m~3,0.54kg,18.23t/hm~2,撒播草灌小区最小,分别为2.98m~3,1.59kg,31.81t/hm~2。与裸露相比,撒播草灌后产流量减少14.73%,产渣量减少5.56%,侵蚀总量减少40.65%,撒播草灌对粉煤灰减流减渣效果明显。
[Abstract]:The runoff plot observation method was used to quantitatively analyze the yield of abortion residue of fly ash treated by naked, overlying soil and seeding grass under natural rainfall, and the characteristics of abortion slag under different rainfall conditions were studied. The benefits of different measures are evaluated. The results showed that the total rainfall during the observation period was 1 635.3 mm, the total rainfall duration was 791.09 h, the rainfall was concentrated in April-September, the rainfall was 1 160 mm, and the cumulative rainfall erosion was 7 216.22(MJ mm)/(hm~2 hu, accounting for 92.41 7 months of rainfall in the whole year. The average rainfall intensity was 4.61 mm / h to 67.2 mm / h, and the rainfall was mainly heavy rain (828.9 mm), accounting for 50.69 mm (50.69 mm). The yield of abortive slag was 1.672.271.49m3 in April-September. The amount of slags produced was 0.39 ~ 1.39 ~ 0.33 kg, respectively, and that of abortion was the most in July. The yield of abortive residue was the highest in the three measures of rainstorm (0.72 ~ 1.06m ~ (3) and 0.30 ~ 0.90 ~ 0.21 kg ~ (-1) ~ (-1) ~ 0.19 ~ (1. 16) 0.80 ~ (3) and 0.190.62 ~ 0.17 kg / m ~ (3) respectively), followed by I _ (30), I _ (30) and rainfall erosion again, and the least correlation with rainfall duration. The relationship between abortion slag and rainfall I _ (30) was polynomial function, linear relationship was with rainfall erosivity, and there was no obvious linear relationship with rainfall duration. The relationship between runoff and runoff was polynomial function. The total amount of erosion was the highest, which was 2.98 m ~ (3) ~ (3.59) kg ~ (31) ~ (-1) t 路hm ~ (-2), followed by bare plot (2.24 m ~ (3) 0.54 kg ~ (18. 23) t ~ (-1) 路hm ~ (2), and sown grass irrigation plot was the smallest (2.98 m ~ (-1) ~ 31.59 kg ~ 31.81 t 路h ~ (-1) 路hm ~ (2) respectively. Compared with bare grass irrigation, the yield of grass decreased 14.73%, the amount of slag production decreased 5.56 and the total amount of erosion decreased 40.65%. The effect of sowing grass irrigation on fly ash flow and slag reduction was obvious.
【作者单位】：江西省水土保持科学研究院;江西省土壤侵蚀与防治重点实验室;
【基金】：江西省水利厅科技支撑项目(200305) 江西省科技支撑项目(20111BBF60059)
【分类号】：X705;S157.1

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