Comparative study of some physico-chemical characteristics for Northern Al-Hammar marsh waters before destroyed and after rehabilitation 2004

Abstract EN

Physico-chemical characteristics of water from three stations (1- Garmat bani saed, 2-Al-Hammar, 3- Al- Cheibyesh northern Al-Hammar marsh were determined during the period (Jan.

2004), (April.

2004) and (Jul.

2004) and compared with studies before destroyed.

Electrical conductivity (E.C) of water was increasing in station (1) ranging between (3.7-3.9) mS /cm2 while in other station (2, 3) were ranging (1.6-2.2) mm / cm2, alsosalinity were increasing ranging between (2.36- 3.49), (1.28-1.40) and (1.02-1.28)%0 for station (1- 3) and respectively.

Highest total dissolved solids (TDS) were recorded in station (1) ranging between (2368-2400) mg / l.

Sulphate (So4)were distinctly higher in station (1) ranging between (1040-1250)mg / l compared with stations 2 and 3 that achieving (602-700), (361-400)mg / l respectively, Carbonate (Hco3) were (220-313), (200-240) and (220-200) mg / l for station above.

Chloride and calcium ions concentration were increasing in station 1 (1313-1350) mg / l and (144-133) mg / l for Cl and Ca+2 respectively.

Total hardness (T.H) and magnesium ions concentration were highest in station (3) ranging between (600-650) mg/l, (133-141) mg / l for (T.H) and Mg+2.

Nitrite levels ranging between (0.28-0.33), (0.27-0.36) and (0.31-0.41) ?g-at N / l for station (1-3) respectively while Nitrate levels ranging between (27.6-35.5), (22.4-30.7)?g-at N/l for station 2 and 3 and lowest in station 1 ranging between (9.2-15.8) ) μg / l.

phosphate (Po4) values were highest in station 3 (13.11-15.87) μg-at P / l compared with station 1 and 2 ranging between (0.161-0.813) and (2.232-2.811) ) μg-at P /l for station 1 and 2 respectively.

Dissolved oxygen (D.O) levels for water were ranging between (7-8.6) mg / l for all station during study.

Biological Oxygen Demand (BOD) were very high achieving (3.9-4.8), (3.9-3.6) and (6.1-6.8)mg / l for stations 1-3 respectively.

The increasing of nutrients levels (No2, No3, Po4) and Biological Oxygen demand (BOD) refer to increasing of microorganisms activities after return of water to Al-Ham mar marsh and decomposition of dead bodies left due to desiccation.