Environmental Management Plan for Vijayawada-2041
Figure 20.14: Graph of NDVI and LST correlation Source: Primary
This land surface temperature affects human life as during the daytime, Earth surface absorbs the heat of sun and increases its temperature out of which some warmth rises into the air where gases catch and hold the warmth near the surface and air temperature rise with increase in humidity. It affects human physically, psychologically and socially. It also effects the health condition such as depression, anxiety, dehydration, weakness, loss of salt, headaches, loss of interest in social interaction psychological un-peacefulness. This temperature also influences weather and climate patterns. For example, in places where it is too hot or too cold, the crops may die. Along with this it also affects glaciers, ice sheets, permafrost, etc. in Earth’s ecosystem. Increasing green spaces can reduce the surface temperature in turn reducing other climatic problems as well as health problems including glaciers, ice sheets, etc. 20.13.2.2 Carbon sequestration Trees play an important role in reducing atmospheric CO2 through assimilation. They sequester carbon by capturing carbon dioxide from the atmosphere and transforming it into biomass through photosynthesis. Sequestered carbon is then accumulated in the form of biomass, deadwood, litter and in forest soils. Greens constitute a major carbon pool by absorbing 25% of carbon in atmosphere which includes trees as well as grass. For grass:
Total area of grass and lawns is considered.
Carbon sequestration per year for grass is 1.13 T/Ha/year.
Areas of grass and lawns multiplied by carbon sequestration per year for grass gives total carbon sequestration by grass.
For trees:
The girth of the tree is measured at the girth at breast height (GBH) – 1.32 m above ground surface
Tree diameter is measured as D = GBH + 3.14 (assuming the tree trunk to be cylindrical)
Above ground biomass (AGB) is estimated by multiplying the bio - volume to the green wood density (WD) of tree species. Tree bio – volume (Tbv) value is calculated by: Tbv = 0.4 *D*D*H
Master of Environmental Planning and Management 2020-22
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