ZEMCH 2019 International Conference Proceedings April.2020 | Page 58
solar exposure and solar gain hours are 80 hours less in total during the month of June, with reduction
from 420 hours to 340 hours. Furthermore, the reduction in solar gains for Unit 91 showed a comparison
between the existing case study (Unit 91) and the new shaded same unit with a reduction by 18.5% in
total solar gains on 1st of June.
4.5. The Community Assessment Using LEED (ND) Rating Tool
LEED Neighborhood as a sustainability assessment tool was used to evaluate the community
sustainability or greenness where the tool rating system consists of five categories, and each category
covers a number of requirements. The requirements divided into mandatory requirements and optional
requirements; for optional requirements, LEED allocates a number of points or credits for each category
as shown in Table 2.
Table 2. LEED (ND) allocated points.
Requirements
Smart Location & Linkage
Neighborhood Pattern & Design
Green Infrastructure & Buildings
Innovation & Design Process
Regional Priority Credits
Points
28 Points
41 Points
31 Points
6 Points
4 Points
The total number of points collected indicates the level of each community sustainability according to the
following scale: Certified 40‐49, Silver 50‐59, Gold 60‐69, Platinum 80+.
4.5.1. Assessment Results for the Existing Case Study
Using the LEED Neighborhood and Developments checklist to assess Al Waha community
through each of the five categories resulted in the following:
Smart Location & Linkage: The community fulfill all the five required items and obtain only 11 out
of 25 points allocated to this category, as there is a clear weakness in community linkage and
accessibility.
Neighborhood Pattern & Design: With regards to the community design, the three required items
related to the pattern are available in community design, and the community collected 16 out of
41 credit points. The demerits of the community design indicated in land use diversity, building
design and affordability, and open and assembly areas.
Green Infrastructure & Buildings: This category indicates a weakness in following the sustainable
design requirements related to water and energy efficiency, solar orientation, the use of renewable
energy, and the requirement of green building certification, only 4 points obtained out of 31 total
points allocated.
Innovation & Design Process: This category provides points to the new sustainable innovation not
addressed in LEED, and none of the 6 innovation points were able to be collected.
Regional Priority Credits: This category related to the regional practices and material, and only
one regional point out of 4 was collected.
In total, the community collected only 32 points. This result indicates a low level of sustainability,
and the community could not be certified as a green or sustainable community according to the LEED
(ND) assessment tool. Generally, the weaknesses are indicated in land use, facilities, accessibility,
transportation system, water and energy efficiency.
4.5.2. Assessment Results for the Modified Case Study According to the Three Scenarios
The modified case study according to the three scenarios was assessed using the LEED assessment
tool, and the results for each category as follows:
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ZEMCH 2019 International Conference l Seoul, Korea