Welcome to International Network for Natural Sciences | INNSpub

Assessment of hydrographic and oceanographic studies of right bank outfall drain, Gharo Creek Indus Deltaic Region

Research Paper | May 1, 2017

| Download 3

Mohsin Muzaffar, Mahmood Ahmed Hashmi, Khalid Mehmood, Ibrahim Zia, Syed Imran Hasany

Key Words:

J. Bio. Env. Sci.10( 5), 129-137, May 2017


JBES 2017 [Generate Certificate]


National Institute of Oceanography Pakistan was carried out the Hydrographic and Oceanographic studies of Gharo Creek for outfall structure designing.The proposed Right Bank Outfall Drain (RBOD) which is under construction is to carry Main Nara Valley Drain (MNVD) discharge from Karampur (near Sehwan) to Khuhi (near Kalri Lake) for the capacity of 3,525 cusecs and from Khuhi to Gharo Creek for the capacity of 3,975 cusecs. The proposed RBOD alignments will enroute Karampur near Sehwan RD 0+000 and outfall into Arabian Sea through Gharo Creek at RD 897.The focus of this study of Gharo Creek is on recording the Physical, Chemical and Geological Parameters such as, Tidal, Water Quality, Bathymetric survey, Sea bed sampling and tidal currents.The grain size data indicates calm depositional setting in the area of sampling. However, the presence of poorly to moderately well sort sand and the presence of shells (complete as well as broken fragments) indicates periodic events when the sea water encroaches to the upper part of the Gharo Creek. Dissolved oxygen is most important parameter to determine the water quality of the area. During the spring tidal cycle at station-1 > 6 mg/l and ranged between 6.6-8.43 mg/l, where high concentrations observed during low tide and low concentration at high tide .  At station-2 dissolved oxygen during the Neap tidal cycle not follow the similar pattern of spring tide may be due to the high suspended particle cut the sun light and inhibit the photosynthesis and concentrations was in the range 4.5-8.7 mg/l. Surface seawater salinity at station-1 during the Spring tidal cycle noted was ranged between 4-6.5 ppt. Where low salinity recorded during the low tide which may be due to the input of fresh water from the Gharo stream.During High tide saline water from the creek area causes the higher salinity of Gharo creek area. During the Neap tidal cycle concentration ranges found higher than the Spring tide (3-10ppt) due to the mixing of fresh water from the Gharo fresh water Nallah.


Copyright © 2017
By Authors and International Network for
Natural Sciences (INNSPUB)
This article is published under the terms of the Creative
Commons Attribution Liscense 4.0

Assessment of hydrographic and oceanographic studies of right bank outfall drain, Gharo Creek Indus Deltaic Region

Tariq Masood Ali Khan, Arif Mahmood, Rabbani MM, Moazzam Ali S, Nadeem Faisal. 2008. Influence of Enso on the South West Monsoon rainfall over Pakistan, Understanding and forecasting of Monsoons. Published by center for science and technology of the Non- Aligned and other developing countries (NAM S&T centre); Dehli : INDIA.

Umitsu M. 2001. Influence of sea  level rises on deltas in Asia. Sea- Level Rise and Asian Coast (M.Umitsu and Y. Hiri, Eds.). Kokon, Tokyo, 16-34 P.

National Institute of Oceanography. 2004. Hydrographic And Oceanographic Studies For Outfall Structure, RBOD In Gharo Creek Final Report. National Institute of Oceanography, Karachi, Pakistan.

British Standard Institution. 1975. BS. 1377: Methods of test for soils for civil engineering purposes. British Standards Institution, 143 p.

Shepard FP. 1954. Nomenclature based on sand silt clay ratios. Jour. Sedum., Petrol., 24, 151 P.

Wentworth CK. 1922. A scale of grade and class terms for classic sediments. Journal of Geology, 30, p377.

Jahangir TM, Khuhawar MY, Mastoi GM. 1997. Chemical assessment of water quality at KPOD and Tidal Link of LBOD project. Symposium on Left Bank Out Fall Drain (LBOD) Project and its Impact. Mehran University of  Engineering and Technology, Jamshoro, Sindh 29th Nov. 1997; 53 – 58 P.

Leghari SM, Jafri SIH, Khuhawar MY. 2000. Limnological study of Sonhro, Mehro, pategi and Cholri lakes of District Badin, Sindh Pakistan. Pakistan Journal of Biological Science, 3, 1904 – 1909.

International Union for Conservation of Nature. 2004. State of environment and development of Badin district. International Union for Conservation of Nature Karachi, Sindh, Pakistan.

Khan MA, Abbasi IA, Adi SH, Laghari A, Bilham R. 2002. Bhuj earthquake January 2001. Effects in Nangar Parker region South East Sindh. Geology Bulletin University of Peshawar.

Khuhawar MY, Mastoi GM. 1997. Impact ofdrainage water on quality of Manchhar and Hamallakes. Proceedings National Conference, Impacts of drainage on environment, problems and solution, Mahran university engineering and technology Jamshoro.

Larson JS, PR Adamus EJ, Clairain Jr. 1989. Functional Assessment of Freshwater Wetlands: A Manual and Training Outline. Glaud, Switzerland: WWF Publication 89, 6-62p.

Mac Donald M. 1980. Hunting technical survey. Left Bank Outfall Drain Project Preparation of Water and Power Development Authority (WAPDA).