摘要
本文依据大量实测洪水数据对乌鲁木齐河“960719”洪水的来源、特点及时空分布变化进行了讨论，分析了这场洪水的重视期，并提出了有关建议。
A fierce flood occurred in Urumqi River on July 19, 1996, and brought about a heavy economic loss in the areas along the river, especially to Yuejin Steelworks located in Houxia valley, The peak discharge of the flood was up to 325m3/s, and it is the second largest one only next to the flood occurred in 1953.According to the analysis of observed data of rainfall and flood occurence, this flood was caused by a torrential rainfall and ice - snow melting. During July 18 to 20, the precipitation was over 100 and 60 mm in the alpine zone and mid - mountain zone respectively- About one half of the flood water was formed at the alpine zone which occupies 27. 9% of the total area of Urumqi River Basin, and about 1/3 of which was formed at the mid - mountian zone. From the mountainous area to plain, peak discharge of the flood reduced for 18% gradually and the discharge of the flood reduced for 40%.According to the analysis on flood frequency, the reoccurrence period of such flood is 30 years, the reoccurrence period of three - day flood discharge is 50 years in Urumqi River.
出处
《干旱区地理》
CSCD
北大核心
1998年第1期49-56,共8页
Arid Land Geography
关键词
乌鲁木齐河
洪水
洪峰模数
洪水重现期
洪水分析
flood
modulus of flood peak discharge
three-day flood discharge
reoccurrence period of flood
Urumqi River
