Water quantity and quality changes from forested riparian buffer in Beijing.

Area of Science:

• Environmental Science
• Ecology
• Water Quality Management

Background:

• Riparian buffers serve as critical transitional zones between aquatic and terrestrial ecosystems.
• They are essential for mitigating non-point source pollution, particularly nutrient runoff.
• Understanding vegetation's role in nutrient interception is key for effective buffer design.

Purpose of the Study:

• To evaluate the interception efficiencies of various vegetation types for nitrogen and phosphorus.
• To determine the optimal riparian buffer configurations for nutrient removal.
• To compare the nutrient transport and enrichment capacities of different plant species.

Main Methods:

• Investigated interception efficiencies across canopy, shrub, grass, and litter layers.
• Quantified nitrogen (N) and phosphorus (P) levels in water passing through different vegetation types.
• Analyzed the transportation and enrichment of total nitrogen (TN) and total phosphorus (TP) by selected tree species.

Main Results:

• Canopy, shrub, and grass layers accounted for approximately 80% of total nutrient interception.
• Pinus tabuliformis demonstrated the highest overall interception, reaching up to 71.1%.
• Platycladus orientalis showed the greatest capacity for nitrogen and phosphorus removal, significantly reducing TP and TN concentrations.

Conclusions:

• Riparian buffer designs must differentiate between vegetation levels (canopy, shrub, grass, litter).
• Pinus tabuliformis is optimal for rainfall interception, while Platycladus orientalis is superior for nitrogen and phosphorus removal.
• Future riparian buffer strategies should consider specific forest configurations for enhanced nutrient management.