Table 1.

Zones of sampling and related information

Zone symbol	Zone boundaries	Zone length	Total number of samples
A	From Wadi Gaza to Al-Zahra City	1800 m	(12 samples)*
			-First 5 samples every 50 m.
			-Second 5 samples every 250 m.
B	Al-Zahra City to Al-Baydar restaurant	2000 m	(5 samples)
			-Every 500 m
C	From Al-Byder restaurant to Khalel Alwazer mosque	1800 m	(6 samples)
			- Sample every 300 m.
D	From Khalel Alwazer mosque to the southern part of the Gaza marina	2500 m	(12 samples)
			- Sample every 200 m.
E	The basin of the Gaza marina	450 m	(4 samples)
			-Every 100 m.
F	From the northern part of the Gaza marina to the intelligence building	2800 m	(13 samples)
			- Sample every 200
Total	Study area	12 km	52 samples

*Two samples of the 12 samples were collected from the southern part (300 m to the south) of Wadi Gaza discharge point.