[Simulation and Motivation Analysis of Agricultural Nitrogen Non-point Source Pollution in North Intensive Farming Area].

Understanding the patterns and drivers of agricultural non-point source pollution is crucial for regional ecological governance. Here, we focused on simulating non-point source nitrogen pollution in agricultural areas of the north intensive farming area. Utilizing the InVEST model, ArcGIS hot spot analysis tool, and geodetector, we deeply analyzed the sources, loss loads, key source areas, and driving factors of agricultural non-point source nitrogen pollution from 2000 to 2020.

[Spatial and Temporal Characteristics of Nitrogen Non-point Source Pollution in Beijing-Tianjin-Hebei Region Based on PLUS and InVEST Models].

With the rapid development of the economy and rapid population growth, the destruction of the environment by humans is growing, and the discharge of various pollutants has seriously threatened the regional ecological security. First, based on the 2010 Beijing-Tianjin-Hebei land use data, the PLUS model was used to simulate the 2020 land use data and the accuracy of the simulation results was verified with the real data. The land use data of 2030-2050 under the sustainable development scenario （SSP119）, natural development scenario （SSP245）, and economic development scenario （SSP585） were simulated.

[Simulation and Prediction of Spatiotemporal Variation Characteristics of Nitrogen Non-point Source Pollution in Henan Province Based on FLUS and InVEST Models].

To elucidate the characteristics of nitrogen non-point source pollution in Henan Province under the influence of climate change, this study initially utilized the InVEST model to simulate the temporal and spatial distribution of the N non-point source pollution load in Henan Province from 2000 to 2020, subsequently coupling the FLUS model with the InVEST model, nitrogen point source pollution load, and its spatial distribution in Henan Province from 2030 to 2050 under SSP2-4.5 and SSP5-8.5 climate scenarios.

[Multi-scenario Simulation and Eco-environmental Effect Analysis of Production-Living-Ecological Space in Henan Province Based on PLUS Model].

Considering Henan Province as the research area, based on land use data with a resolution of 30 m in 2000, 2010, and 2020, we analyzed the distribution of the production-living-ecological space and the quality of the ecological environment in Henan Province using land transfer matrices and an eco-environmental effect model. Furthermore, based on 2020 land use data, the PLUS model was used to simulate land use data for the years 2030, 2040, and 2050 under three scenarios： natural development, production priority, and ecological priority. Finally, we calculated the ecological environment quality index and ecological contribution rate.

[Characteristics of Spatial and Temporal Changes in Carbon Stocks in the Middle and Upper Reaches of the Huaihe River Basin and Future Multi-scenario Simulation Prediction].

The Huaihe River Basin is located in the north-south climate transition zone of China. The change of carbon storage in this area is of great significance for predicting the future ecological protection, mitigating climate change, and maintaining sustainable development of the Huaihe River Basin. The middle and upper reaches of Huaihe River Basin （above Bengbu station） were taken as the research area.