Impact of Meteorological Drought on Streamflow Drought in Jinghe River Basin of China

来源 :Chinese Geographical Science | 被引量 : 0次 | 上传用户:xiaopingchina99
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Under global climate change, drought has become one of the most serious natural hazards, affecting the ecological environment and human life. Drought can be categorized as meteorological, agricultural, hydrological or socio-economic drought. Among the different categories of drought, hydrological drought, especially streamflow drought, has been given more attention by local governments, researchers and the public in recent years. Identifying the occurrence of streamflow drought and issuing early warning can provide timely information for effective water resources management. In this study, streamflow drought is detected by using the Standardized Runoff Index, whereas meteorological drought is detected by the Standardized Precipitation Index. Comparative analyses of frequency, magnitude, onset and duration are conducted to identify the impact of meteorological drought on streamflow drought. This study focuses on the Jinghe River Basin in Northwest China, mainly providing the following findings. 1) Eleven meteorological droughts and six streamflow droughts were indicated during 1970 and 1990 after pooling using Inter-event time and volume Criterion method. 2) Streamflow drought in the Jinghe River Basin lagged meteorological drought for about 127 days. 3) The frequency of streamflow drought in Jinghe River Basin was less than meteorological drought. However, the average duration of streamflow drought is longer. 4) The magnitude of streamflow drought is greater than meteorological drought. These results not only play an important theoretical role in understanding relationships between different drought categories, but also have practical implications for streamflow drought mitigation and regional water resources management. Under global climate change, drought has become one of the most serious natural hazards, affecting the ecological environment and human life. Drought can be categorized as meteorological, agricultural, hydrological or socio-economic drought. Among the different categories of drought, hydrological drought, especially streamflow drought, has been given more attention by local governments, researchers and the public in recent years. Identifying the occurrence of streamflow drought and issuing early warning can provide timely information for effective water resources management. In this study, streamflow drought is detected by using the Standardized Runoff Index, but meteorological drought is detected by the Standardized Precipitation Index. comparative analyzes of frequency, magnitude, onset and duration are conducted to identify the impact of meteorological drought on streamflow drought. This study focuses on the Jinghe River Basin in Northwest China, mainly providing the following f indings. 1) Eleven meteorological droughts and six streamflow droughts were indicated during 1970 and 1990 after pooling using Inter-event time and volume Criterion method. 2) Streamflow drought in the Jinghe River Basin landed meteorological drought for about 127 days. 3) The frequency of streamflow drought in Jinghe River Basin was less than meteorological drought. However, the average duration of streamflow drought is longer. 4) The magnitude of streamflow drought is greater than meteorological drought. These results not only play an important theoretical role in understanding relationships between different drought categories, but also have practical implications for streamflow mitigation and regional water resources management.
其他文献
我院于1989年5月~1999年5月共收住院病人1834例,其中危重病人408例,占住院病人总数的22.2%,现作简要分析。危重病例的临床特点:性别,男298例,女110例,男女比例为2.7:1;年龄,2
高考英语阅读理解题型的设置主要分为词义猜测题、推理判断题、篇章结构题、主旨大意题和细节理解题五大类。备考时若能将其逐类击破,便能轻松制胜高考阅读。 The college e
作者观察了犬冠状动脉急性闭塞再灌注过程中中性白细胞膜流动性及血清肌酸磷酸激酶(CPK)的变化.结果表明:冠状动脉左前降支(LAD)阻断后,心大静脉回流血中中性白细胞膜荧光偏振P值升高,阻断前
骨髓活检塑料包埋技术对血液病的诊断意义第二附属医院内科韩照平,龚五星,赵云,聂惠关键词骨髓;活组织检查,针吸;血液病;诊断;塑料包埋;方法骨髓活检塑料包埋方法国外己有报道[1]。但对多
1933年6月12日,有66国代表参加的以拯救世界经济为目标的会议在伦敦召开。已为世界最大经济体,亦为大萧条第一大祸源的美国采取的抵制态度使会议以失败告终,世界政治经济走向
在小学语文教学中注重培养学生良好的语文学习习惯,对学生更好的学习语文提高自身素质有着不可估量的作用,孩子将受用终生。有多少文人志士从小就养成了良好的语文学习习惯,
2002年,江苏省泗阳县实验小学创办了一所现代化的新型校园——泗阳双语实验学校。她有着独特的教育思想——“关爱学生生命发展”;她有着卓越的育人目标——“忠实成就孩子们
《图书馆研究与工作》(季刊)是由浙江省图书馆学会和浙江图书馆联合主办的学术性和知识性相结合的综合性图书情报专业刊物,它立足浙江,面向全国,坚持理论研究与实际工作相结
虽然风湿性心脏病逐年相对减少。住院年龄逐年增长,病死率明显下降。然而风心病在住院心脏病患者中仍居重要地位。为掌握近年来风心病死亡患者特点及其死亡危险因素,我们对
报告重组干扰素静脉滴注治疗新生儿呼吸道合胞病毒(RSV)肺炎13例,对照组11例。结果表明:治疗组在临床症状及体征消失时间、平均住院日数均明显短于对照组(P