Analysis of Characteristics and Driving Factors of Wetland Landscape Pattern Change in Henan Province from 1980 to 2015

Abstract

The study of the temporal and spatial evolution of wetland landscapes and its driving factors is an important reference for wetland ecological restoration and protection. This article utilized seven periods of land use data in Henan Province from 1980 to 2015 to extract the spatial distribution characteristics of wetlands and analyze the temporal and spatial changes of wetlands in Henan Province. Transfer matrix, landscape metrics, correlation analysis, and redundancy analysis were applied to calculate and analyze the transformation types and area of wetland resources between all consecutive periods, and then the main driving factors of wetland expansion/contraction were explored. First, the total wetland area in Henan Province increased by 28% from 1980 to 2015, and the increased wetland area was mainly constructed wetlands, including paddy field, reservoir and pond, and canal. Natural wetlands such as marsh, lake, and floodplain decreased by 74%. Marsh area declined the most during 1990–1995, and was mainly transformed into floodplain and “Others” because of agricultural reclamation, low precipitation, and low Yellow River runoff. The floodplain area dropped the most from 2005 to 2010, mainly converted to canals and “Others” because of reclamation, exploitation of groundwater, the construction of the South–to–North Water Transfer Project, and recreational land development. Second, the results of correlation analysis and redundancy analysis indicated that economic factors were positively correlated with the area of some constructed wetlands and negatively correlated with the area of some natural wetlands. Socioeconomic development was the main driving factors for changes in wetland types. The proportion of wetland habitat in Henan Province in 2015 was only 0.3%, which is low compared to the Chinese average of 2.7%. The government should pay more attention to the restoration of natural wetlands in Henan Province.

Analysis of the impact of land use on floating object in rivers at different spatial scales—the Chongqing section of the Three Gorges Reservoir area

“…The analysis found that under different buffer scales, urban, rural residential, farmland, gardenland, grassland and other land types all were positively correlated with the number of floating debris spots. The analysis results were similar to those of Xia Huijuan et al (Li et al, 2021;Wang et al, 2021;Xia et al, 2021) Rural settlements, farmland, and the number of floating debris spots had strong positive correlations. Weak positive correlations were found with urban, gardenland, and grasslands.…”

Dynamic change characteristics of wetlands in Hefei and their driving factors along the urban–rural gradient

“…Regarding ecological surroundings factors, compared with the situation before 2010, when terrain factors and soil factors were dominant, the influence of climate factors on wetland reduction increased after 2010. Climate changes such as reduced rainfall, increased temperatures, or extreme weather, intensify the reduction of wetlands to some extent (Li et al 2021;Li et al 2020b). In urban gradienttype regions, anthropogenic interference is most severe.…”

Simulating the Coupling of Rural Settlement Expansion and Population Growth in Deqing, Zhejiang Province, Based on MCCA Modeling

“…(2) Land use demands and land use transfer matrix rules (2) Land use demands and land use transfer matrix rules For the model calibration and prediction, the historical (2000-2020) and future land use demands (2035) were prepared. We used the method for linear regression [52], which can project future land use demands for a specific period while outputting the historical land use amounts. Table 3 shows the land use demands.…”