青海东部干旱发生规律及其变化趋势

通过对青海东部地区干旱状况的调查, 结合气候变化，分析该地区的干旱特点、形成原因、时空分布及干旱的成灾和危害程度。结果表明：受全球变暖的影响，青海省东部地区自20世纪70年代以来，气温持续升高，降水量没有显著增加，河川径流略有减少，导致该地区干旱频繁发生，并且在今后一段时期内，干旱形势难以缓解。由此引发的地质灾害和农业生物灾害等会给该地区带来一系列环境问题。

Study on Occurrence Pattern and Trend of Drought in East Qinghai Province

In this paper,the characteristics,formation causes,spatiotemporal distribution,disaster mechanism and degree of drought in east Qinghai Province were analyzed based on the investigated results and the data of climate change in the study area.The results show that,affected by global warming,the air temperature has been in an increase trend since the 1970s,the precipitation increase was not significant,annual runoff volumes of the rivers were slightly reduced,drought occurred frequently,and it is difficult to alleviate drought in near future.Consequently,soil erosion,landslides,avalanches and other geological disasters,agriculture biological disasters and a series of ecological problems would be induced.The development pattern and trend of drought in east Qinghai Province along with climate change were discussed.