Geoscience Reference
In-Depth Information
Other Soil
Characteristics
Catchment
Boundary
Poor Drainage
Poor Drainage
Slightly Salty
Slightly Salty
Insufficient Drainage
17
1
Slightly Salty, Alkaline
20
9
6
14
19
Slightly Salty, Alkaline
Insufficient Drainage
16
5
15
10
18
Rocky
8
Rocky
Insufficient Drainage
4
13
7
Salty,
Insufficient Drainage
3
22 11
Stony
Salty Alkaline
Insufficient Drainage
FIGURE 9.5.4C Other soil characteristics.
9.5.1.1.1.8 Hydrological Characteristics
As an initial step in hydrological studies, watershed delineation was made using con-
ventional methods and watershed modeling system (WMS) 6.1 5 software. Figure 9.5.5
represents a sketch of watershed subbasins.
To estimate the annual water budget in the watershed, the rational method was
preferred as a preliminary approach for computations, which was then improved by
use of a more complex flow and hydrological models such as QUAL2E 6 and HSPF. 7
Application of these models to the Koycegiz-Dalyan Lagoon and its streams is
explained in Section 9.5.1.2.2.
As a basis to assess acute diffuse pollution and flood risks due to catastrophic
storms, an intensity-duration-frequency (IDF) analysis was completed. The results
indicate that significant storm events might occur in December-February and that
every 100 years a single storm event, where the total average monthly precipitation
could fall in only 5 min, is likely. Under normal conditions, on the other hand, every
2 days during the rainy season a rainfall event of average intensity could be observed.
 
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