Afforestation for Reduction of NOx Concentration in Lanzhou China

Abstract

Lanzhou is one of the major industrial cities in northwest China, the capital of Gansu Province, and located at a northwest-to-southeast oriented valley basin with elevation about 1,500-1,600-m. Due to topographic and meteorological characteristics, Lanzhou is one of the most polluted cities in China Meteorological conditions (low winds, stable stratification especially inversion), pollutant sources and sinks affect the air quality Lanzhou government carried out afforestation and pollutant-source reduction (closing several heavy industrial factories) to improve the air-quality for the past two decades In this study, effect of afforestation on reducing the NOx concentration is investigated numerically using RAMS-HYPACT model.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2008
Accession Number
ADA478899

Entities

People

  • Peter Cheng Chu
  • Shihua Lü
  • Yuchun Chen

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Biomedical

DTIC Thesaurus Topics

  • Air Pollution
  • Atmospheric Motion
  • Boundary Layer
  • Coordinate Systems
  • Environmental Protection
  • Geography
  • Governments
  • Grids
  • Inversion
  • Lapse Rate
  • Latent Heat
  • Spatial Distribution
  • Temperature Gradients
  • Three Dimensional
  • Turbulence
  • Turbulent Diffusion
  • Urban Areas

Fields of Study

  • Environmental science

Readers

  • Analytical Chemistry
  • Internal Combustion Engine (ICE) Technology.
  • Political Science/ International Relations/ European Studies