In this paper

there is a more thorough discussion about the phase change

trends

cause and grade distribution of drought and flood disasters in Urumqi-Changji region by collecting and collating historical materials during 1756-1955. The results showed that the distribution of drought and floods has obvious stages

it is a low incidence of disasters in 1756-1875

but a high incidence in 1876-1955; the frequency of disasters also have significant spatial differences

Qitai country

Hutubi country

Fukang city

Changji city and Urumqi are mainly regional drought

floods occurred in Urumqi and Qitai county

but less frequently in other regions. Droughts and floods occurred mainly in spring and summer

and when occurred less in autumn and occasionally in winter. From the point of view causes

there are two main factors that there are natural and man-made to occurred of droughts and floods in which natural is main and man-made only played a role in strengthening and amplifying.