ZHAO Xiulan,ZHOU Rui,ZHANG Fu,et al.Change Trend of Precipitation, Runoff and Sediment in the Upper Zulihe River Basin from 1957 to 2016[J].Research of Soil and Water Conservation,2020,27(03):83-90.
1957-2016年祖厉河上游降水与水沙变化趋势
- Title:
- Change Trend of Precipitation, Runoff and Sediment in the Upper Zulihe River Basin from 1957 to 2016
- 文章编号:
- 1005-3409(2020)03-0083-08
- Keywords:
- runoff and sediment characteristics; precipitation; Mann-Kendall test; Morlet wavelet; change trend
- 分类号:
- P332.1; P332.5
- 文献标志码:
- A
- 摘要:
- 为了探究半干旱黄土区降水量与径流量、输沙量变化趋势及周期分布规律,采用M-K突变检验、Morlet小波及回归分析,对祖厉河上游1957—2016年降水量与径流量、输沙量进行了研究。结果表明:降水量、径流量和输沙量呈现出逐年减少的趋势,年际存在明显的“丰—枯”周期性变化。1957—1974年降水量呈增加趋势,其中1963—1968年达到显著水平(p<0.05); 1975—1994年无明显的增减趋势,呈波动变化; 1995—2016年呈不显著减少趋势(p>0.05); 径流量和输沙量变化与降水量相似,1957—1974年呈增加趋势,1975—1994年呈不显著减少趋势,1995—2016年呈显著减少趋势(p<0.05)。年降水量存在3 a,5 a,13 a和18 a的平均变化周期; 径流量存在3 a,6 a和18 a的平均变化周期,输沙量存在3 a,4 a,5 a和18 a的平均变化周期。径流量、输沙量对降水量变化响应由强逐渐减弱,对水土保持措施量变化响应逐渐增强。
- Abstract:
- In order to explore the change trends of precipitation, runoff, sediment discharge and periodic distribution in semi-arid loess area, based on the data during the period of 1957—2016, the Mann-Kendall trend analysis, mutation test, Morlet wavelet and regression analysis method were used to analyze the precipitation, runoff and sediment discharge change in the upper reaches of Zulihe River. The results showed that the precipitation, runoff and sediment discharge presented the decreasing trend year by year, and there was an obvious cyclical change of abundance-drought during the years; from 1957 to 1974, precipitation presented the increasing trend, which reached a significant level from 1963 to 1968 (p<0.05), there was no significant increase or decrease in 1975—1994, showing a fluctuating change; from 1995 to 2016, it showed no significant decrease (p>0.05); the variation of runoff and sediment discharge was similar to precipitation; runoff and sediment discharge presented the increasing trend from 1957 to 1974, and there was no significant decrease from 1975 to 1994, and significant decrease from 1995 to 2016(p<0.05). The annual precipitation had the average change periods of 3-year, 5-year, 13-year and 18-year; runoff had the average change periods of 3-year, 6-year and 18-year, and the sediment discharge had the average change periods of 3-year, 4-year, 5-year and 18-year. The response of runoff and sediment discharge to the change of precipitation gradually weakened, and the response of runoff and sediment discharge to soil and water conservation measures gradually enhanced.
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备注/Memo
收稿日期:2019-06-03 修回日期:2019-07-05资助项目:甘肃农业大学林学一级学科建设开放基金课题“不同措施下黄土丘陵沟壑区生态系统水土保持功能分析”(GSAU-XKJS-2018-105); 甘肃中部不同尺度水保措施强度与蓄水保土效率研究(xz20190523)第一作者:赵秀兰(1994—),女,甘肃陇南人,硕士研究生,研究方向为水土保持。E-mail:zhaoxl123@163.com通信作者:张富(1961—),男,甘肃定西人,研究员,博士,研究方向为水土流失规律及水土保持措施研究。E-mail:fuzhang001@163.com