The measurement of high-quality economic development and regional research plays a crucial role in achieving ecologically led high-quality development. This paper aims to establish a comprehensive evaluation index system for the high-quality level of development in Ningxia’s Yellow River ecological and economic zone, focusing on five dimensions: innovation, coordination, green, openness, and shared. By employing a factor analysis, this study estimates the level of high-quality development along the Yellow River Ecological Economic Belt in Ningxia for the year 2020. A multi-index panel data factor analysis and entropy weight TOPSIS method are employed to analyze the spatiotemporal evolution characteristics of high-quality development across 10 counties from 2014 to 2020. The empirical findings reveal that, in 2020, the overall level of high-quality development in the region remained relatively low. Among the contributing factors, shared and coordinated development demonstrated the highest impact on high-quality development, while open, green, and innovative development showed limited influence. Only Xingqing District, Litong District, and Helan County in the 10 counties have a composite factor score of greater than 0 on the level of economic development, while the other 7 counties have a composite score of less than 0. The study also identified a significant spatial heterogeneity in the quality of high-quality development along Ningxia’s Yellow River Ecological Economic Belt. Through a cluster analysis, the regions along the Yellow River Ecological Economic Belt in Ningxia are classified into categories of high, medium, and low levels of quality development. Over the period from 2014 to 2020, each county exhibited a steady increase in high-quality development, while the differences in development levels among the 10 counties gradually diminished. Based on these findings, practical suggestions are provided to guide Ningxia in leading the path of high-quality development through ecological civilization construction along the Yellow River ecological economy.

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In the context of global climate changing and the influence of human activities, "sponge city" is put forward to realize the purification, collection and reuse of rainwater. The effective evaluation of LID facilities in sponge cities is of great guiding significance for the promotion and construction of sponge cities. IFMS (Integrated Flood Modeling System) Urban was selected to construct the rainstorm simulation. LID parameters were added to simulate the improvement of urban waterlogging after the construction of sponge city. A reasonable disaster loss assessment method was used to calculate the disaster mitigation benefit brought by the construction of sponge city. Through the comparison of the inundation situation before and after LID facilities construction, it can be concluded that the mitigation effect of LID facilities on the overall inundation area of the city decreases with the increase of rainfall recurrence period, with the maximum reduction rate reaching 13.63% in the 5-year recurrence period and the minimum reduction rate of 11.06% in the 50-year recurrence period. LID facilities have a better disaster reduction effect for rainfall events with a small recurrence period than for rainfall events with a large recurrence period.