Monitoring the Landscape Pattern and Characteristics of Non-Point Source Pollution in a Mountainous River Basin
| Autor: | Yuepeng Liu, Wei Qi, Mengwen Wang, Chuanfeng Yang, Xinyang Yu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Pollution
China Nitrogen Health Toxicology and Mutagenesis media_common.quotation_subject Drainage basin Forests landscape patterns Sink (geography) Article Rivers Water Quality Precipitation Water pollution Nonpoint source pollution “source-sink” theory media_common Hydrology geography location weighted landscape contrast index (LWLCI) geography.geographical_feature_category non-point source pollution Public Health Environmental and Occupational Health Vegetation Environmental science Medicine Water quality Water Pollutants Chemical Environmental Monitoring |
| Zdroj: | International Journal of Environmental Research and Public Health Volume 18 Issue 21 International Journal of Environmental Research and Public Health, Vol 18, Iss 11032, p 11032 (2021) |
| ISSN: | 1660-4601 |
| DOI: | 10.3390/ijerph182111032 |
| Popis: | This study aimed to assess the relationship between the landscape patterns and non-point source (NPS) pollution distribution in Qixia County, China. The sub-basin classification was conducted based on a digital elevation model and Landsat8 satellite images. Water samples were collected from each sub-basin, andtheir water quality during the wet and dry seasons was estimated. The correlation between the landscape indices and water pollution indicators was determined by Pearson analysis. The location-weighted landscape contrast index (LWLCI) was calculated based on the “source-sink” theory. Qixia was further divided into five sections based on the LWLCI score to illustrate the potential risk of NPS pollution. The results showed that the water quality in Qixia County was generally good. Cultivated land, orchards, construction areas, and unused land were positively correlated with the water pollution index and weredesignated as the “source” landscape categories, while forests, grasslands, and water bodies, which were negatively correlated with water pollution, were the “sink” landscapes the LWCI was high in 36.94% of the study area. In these areas, measures such as increasing vegetation buffer zones are necessary to decrease the sediment and nutrient loads carried by precipitation. |
| Databáze: | OpenAIRE |
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