## 4 Results
### Drought Risk Assessment
(2) Excessive grazing and excessive mining are some of the ways to artificially cause drought in Inner Mongolia. With the increase in grazing costs, pastoralists can only rely on more grazing to eliminate these increased costs, resulting in overgrazing and ecological deterioration of pastures. At the same time, the mineral resources in Inner Mongolia are very rich, but rainfall will lead to reduced mining efficiency. To protect economic benefits, enterprises will adopt artificial rain dispersal. Measures can be taken to control the pasture and mining industries: Controlling the development of pasture can reduce the livestock deaths caused by drought and reduce the exposure of the disaster-bearing body; on the other hand, the ecological conditions of grasslands can be gradually restored to alleviate the impacts of drought. For overexploitation, the government can appropriately control the mining enterprise while replenishing the economic losses faced by companies due to rainfall. (3) Due to the hindrance of the warm and humid air currents from the Indian Ocean by the Himalayas, the leeward slope of the Qinghai-Tibet Plateau is one of the main factors causing drought in Qinghai. Moreover, the high wind speed caused by the high altitude will further accelerate evaporation. Increasing afforestation can reduce ecological fragility while reducing wind speed, which seems to be a way to alleviate drought. (4) The arid environment in Xinjiang is caused by the fact that it is located far from the ocean. The water availability from the ocean gradually decreases during long-distance transportation. When this water reaches Xinjiang, it is blocked by the mountains. Both the water and the regional differences in precipitation distribution decrease. Because urban expansion led to the destruction of large areas of vegetation, the living and industrial water requirements both increased, while surface water and groundwater were severely overdrawn, which directly led to drought in Xinjiang. Therefore, a reduction in domestic and industrial water use and maintenance of the surface and groundwater levels should be focused on in this area. (5) The main risk factors in Guangdong, Guangxi and Yunnan are high exposure (Guangdong is also accompanied by high vulnerability), and the large population is one of the main reasons for high exposure. Therefore, a feasible solution is to control the permanent population and convert the primary industry into a tertiary industry. In general, the emissions of greenhouse gases and pollutants should be controlled in the northern region, and the population and transformation of the primary industry into a tertiary industry should be controlled in the southern region. \begin{table}
\begin{tabular}{c c c} \hline \hline
**Province** & \multicolumn{2}{c}{**Main Risk Factors**} \\ \hline Gansu & Hazard & Vulnerability \\ Ningxia & Hazard & Vulnerability \\ Inner Mongolia & Hazard & Exposure \\ Xinjiang & Hazard & Vulnerability \\ Guangdong & Vulnerability & Exposure \\ Qinghai & Hazard & \\ Shanxi & Vulnerability & \\ Guangxi & Exposure & \\ Yunnan & Exposure & \\ \hline \hline \end{tabular}
\end{table} 
Table 4: Main risk factors by region.