Study on relationship between agricultural nonpoint source pollution output and rainfall runoff in the typical small watershed of the three Gorges Reservoir Area

2011 ◽  
Author(s):  
Zhengbao Sun ◽  
Zhijian Chen ◽  
Xiaoyong Liao ◽  
Haiming Wang
Keyword(s):  
Nonpoint Source Pollution ◽  
Three Gorges Reservoir ◽  
Nonpoint Source ◽  
Three Gorges Reservoir Area ◽  
Three Gorges ◽  
Rainfall Runoff ◽  
Small Watershed ◽  
The Three Gorges ◽  
Agricultural Nonpoint Source Pollution ◽  
Agricultural Nonpoint Source

Simulation of the dissolved nitrogen and phosphorus loads in different land uses in the Three Gorges Reservoir Region—based on the improved export coefficient model

2015 ◽  
Vol 17 (11) ◽  
pp. 1976-1989 ◽  
Author(s):  
Jinliang Wang ◽  
Jing'an Shao ◽  
Dan Wang ◽  
Jiupai Ni ◽  
Deti Xie
Keyword(s):  
Nonpoint Source Pollution ◽  
Three Gorges Reservoir ◽  
Nonpoint Source ◽  
Water Bodies ◽  
Three Gorges ◽  
Land Uses ◽  
Nitrogen And Phosphorus ◽  
Dissolved Nitrogen ◽  
The Three Gorges ◽  
Phosphorus Loads

Nonpoint source pollution is one of the primary causes of eutrophication of water bodies.

scholarly journals Effects of Landscape Positions and Landscape Types on Soil Properties and Chlorophyll Content of Citrus in a Sloping Orchard in the Three Gorges Reservoir Area, China

2021 ◽  
Vol 13 (8) ◽  
pp. 4288
Author(s):  
Siyue Sun ◽  
Guolin Zhang ◽  
Tieguang He ◽  
Shufang Song ◽  
Xingbiao Chu
Keyword(s):  
Soil Properties ◽  
Chlorophyll Content ◽  
Three Gorges Reservoir ◽  
Slope Position ◽  
Three Gorges Reservoir Area ◽  
Three Gorges ◽  
Reservoir Area ◽  
The Three Gorges Reservoir ◽  
The Three Gorges ◽  
Landscape Types

In recent years, soil degradation and decreasing orchard productivity in the sloping orchards of the Three Gorges Reservoir Area of China have received considerable attention both inside and outside the country. More studies pay attention to the effects of topography on soil property changes, but less research is conducted from the landscape. Therefore, understanding the effects of landscape positions and landscape types on soil properties and chlorophyll content of citrus in a sloping orchard is of great significance in this area. Our results showed that landscape positions and types had a significant effect on the soil properties and chlorophyll content of citrus. The lowest soil nutrient content was detected in the upper slope position and sloping land, while the highest exists at the footslope and terraces. The chlorophyll content of citrus in the middle and upper landscape position was significantly higher than the footslope. The redundancy analysis showed that the first two ordination axes together accounted for 81.32% of the total variation, which could be explained by the changes of soil total nitrogen, total phosphorus, total potassium, available nitrogen, available potassium, organic matter, pH, and chlorophyll content of the citrus. Overall, this study indicates the significant influence of landscape positions and types on soil properties and chlorophyll content of citrus. Further, this study provides a reference for the determination of targeted land management measures and orchard landscape design so that the soil quality and orchard yield can be improved, and finally, the sustainable development of agriculture and ecology can be realized.

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