摘要
本文研究了1951-2010年韩江干流潮安站径流量的基本变化特征,结果表明:潮安站年径流量年内分配不均,年径流量呈现不显著增加趋势,在60年代和21世纪两个时代水量偏枯,而在70-90年代水量相对较多;Morlet小波变换表明该站径流量存在2a、8a和11a等周期变化,与厄尔尼诺和太阳黑子的运动周期有关;P-Ⅲ型分布对洪峰流量拟合较好,洪水频率计算可以为区域水利建设和防洪提供一定的依据。
@@@@This paper studied the basic runoff characteristics of Chaoan station in Hanjiang river basin during 1951-2010. It was showed that the distribution of runoff is unequal during the year and the annual runoff increases not significantly. It has less quantity of runoff in 1960s and in the 21st century but has more from the 1970s to the 1990s. The runoff has 2a, 8a, and11a periods based on the Morlet wavelet transform method. This may be related to the El Ni?o phenomenon and the movement of sunspot. The extreme flood runoff is consistent with the distribution of P-Ⅲ,the calculation of flood frequency can provide a basis for the construction of water conservancy and the flood prevention in local area.
出处
《科技与企业》
2013年第13期170-171,共2页
Science-Technology Enterprise
