Study on the Water Quality Characteristics of the Baoan Lake Basin in China under Different Land Use and Landscape Pattern Distributions

Abstract

Land use and landscape pattern highly affect water quality. Their relationship can assist in land-use management and improve land-use efficiency. In this study, a water quality survey of rivers and lakes was performed in 2020 to analyze the effects of land use and the landscape pattern on the water quality of the rivers and lakes in the Baoan Lake basin and is expected to provide a reference for land use planning. The results demonstrated that the effects of land use on water quality were generally higher during the dry season than during the wet season; however, the opposite was demonstrated for the landscape pattern index. Cropland and urban land were closely correlated with deteriorating water quality, with contributions to total nitrogen, total phosphorous, and ammonia nitrogen in the basin. The impact of the landscape pattern of the basin on water quality was controlled by the original land-use type. In addition, the landscape configuration formed different land-use types to produce different effects on water quality. The basin scale better explained the changes in water quality, especially for construction land, followed by the 250 m and 500 m scales in the buffer zone.

Long‐Term Changes and Influencing Factors of Water Quality in Aquaculture Dominated Lakes Unveiled by Sediment Records and Time Series Remote Sensing Images

“…Therefore, clear interpretations of the relationship between landscape pattern and water quality are essential to explore effective methods for lake water quality improvement. Most of the previous studies focused on the relationship between landscape pattern and water quality of lakes in the watershed scale (Peng & Li, 2021; Ren et al., 2022). In enclosure aquaculture dominated lakes, the lake surface was usually separated into fragmented water bodies by means of nets and fences to carry out aquaculture activities.…”

“…However, it is difficult to obtain the long‐term data of these influencing factors in enclosure aquaculture lakes. It is reported that lake water quality is closely correlated with the landscape pattern in the watershed scale (Liu et al., 2012; Ren et al., 2022), which nevertheless is insignificant in the enclosure aquaculture dominated lakes due to intensive anthropogenic interferences within the lakes (He et al., 2021). Recently, Li et al.…”

“…However, it is difficult to obtain the long-term data of these influencing factors in enclosure aquaculture lakes. It is reported that lake water quality is closely correlated with the landscape pattern in the watershed scale (Liu et al, 2012;Ren et al, 2022), which nevertheless is insignificant in the enclosure aquaculture dominated lakes due to intensive anthropogenic interferences within the lakes (He et al, 2021). Recently, Li et al (2022) and He et al (2021) have concluded that the landscape pattern metrics calculated within the aquaculture lakes (e.g., landscape composition and landscape configuration) had a significant influence on water quality.…”