鲁中南山丘区坡面产流产沙与降雨关系

发布时间：2018-07-10 18:35

本文选题：鲁中南山丘区 + 径流小区　；参考：《水土保持学报》2017年01期

【摘要】：为探求鲁中南山丘区坡面侵蚀规律,选取山东省泰安市药乡小流域,以4个坡面径流小区的降雨、径流、泥沙实测资料为基础,探究不同措施下各小区产流产沙的差异性和导致产流的降雨量临界值,并利用相关分析方法探究径流泥沙与降雨的相关关系。结果表明:(1)导致径流产生的降雨量临界值表现为裸地农地草地,草地临界降雨量分别比梯田种植、横坡种植、裸地高0.2,2.8,3.8mm;(2)在相同的降雨条件下,各小区产流产沙均为裸地最大,其中产流量约为农地的1.3~4.3倍,约为草地的2.8倍;产沙量约为农地的3.1~10.4倍,约为草地的77.6倍;产流开始时间以裸地最早,草地最晚,二者之间相差37min,结束时间正好相反;(3)通过对不同降雨因子与产流产沙进行皮尔逊相关分析,除降雨历时(D)外,其它降雨因子均与产流、产沙量有较好相关性,其中与降雨量(P)相关性最强。
[Abstract]:In order to find out the erosion law of slope surface in the mountainous region of central and southern Shandong Province, the small watershed of Yixiang in Taian City, Shandong Province, is selected, and the measured data of rainfall, runoff and sediment in four runoff plots on the slope surface are taken as the basis. The difference of runoff and sediment yield in different plots and the critical value of rainfall that lead to runoff and runoff were explored. The correlation between runoff and sediment and rainfall was explored by using correlation analysis method. The results showed that: (1) the critical value of rainfall caused by runoff was bare farmland and grassland, the critical rainfall of grassland was higher than that of terrace planting, horizontal slope planting, and bare land was higher than that of terrace planting, and (2) under the same rainfall conditions, the yield of abortive sand in each plot was the largest in bare land. The yield of runoff is about 1.3 times of farmland and 2.8 times of that of grassland, and the sediment yield is about 3.1 ~ 10.4 times of farmland and 77.6 times of grassland. The time of runoff production is the earliest in bare land and the last in grassland. The difference between them is 37 mins and the end time is opposite. (3) by Pearson correlation analysis of different rainfall factors and sediment yield, except rainfall duration (D), all other rainfall factors have good correlation with runoff and sediment yield. Among them, the correlation with rainfall (P) was the strongest.
【作者单位】：山东农业大学林学院山东省土壤侵蚀与生态修复重点实验室泰山森林生态系统定位研究站;
【基金】：水利部全国水土流失动态监测与公告项目(水保监201505)
【分类号】：S157.1

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