Search or add a thesis

Advanced Search (Beta)
Home > Hydrogeological Modeling for Spatio-Temporal Assessment of Groundwater Fluctuation and Quality: A Case Study in Lower Chenab Canal, Pakistan

Hydrogeological Modeling for Spatio-Temporal Assessment of Groundwater Fluctuation and Quality: A Case Study in Lower Chenab Canal, Pakistan

Thesis Info

Access Option

External Link

Author

Muhammad Awais

Program

PhD

Institute

University of Agriculture

City

Faisalabad

Province

Punjab

Country

Pakistan

Thesis Completing Year

2019

Thesis Completion Status

Completed

Subject

Engineering & Technology

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/11529/1/Muhammad%20%20awais%20water%20resources%20engg%202019.doc

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676727770666

Similar


Groundwater is imperative for global food production, lifeline for all types of agriculture, cultures associated with it and inhabitants around the globe. In Pakistan, irrigation water supplies for 40-60% area are met through groundwater resources depending upon rainfall variability. The 70 percent farming community of the province Punjab, Pakistan fulfill their crop water demands either directly or indirectly from groundwater. Resultantly, the aquifer has depleted and deterioration in groundwater quality is observed due to upcoming of saline water. A detailed investigation was carried out to address the aforementioned issues in Lower Chenab Canal (LCC-E) command area of Punjab, Pakistan. The field data from 2005-2013 were utilized for the analysis of prevailing groundwater levels and GIS mapping was used to study the groundwater quality patterns. The field data from 2005-2013 of water levels and quality patterns were analyzed and mapped by employing GIS. A three dimensional groundwater flow model employing USGS developed code MODFLOW-2005 was used for existing and future predictions of groundwater levels up to 2033, and MT3DMS transport model was utilized for groundwater quality assessment. The model was calibrated manually for the steady state initially; the groundwater levels for the year 2006 were used as the initial conditions and hydraulic conductivity values were adjusted to have a close agreement between observed and simulated heads. The Parameter estimation tool acronym as ‘PEST’ was utilized for transient state calibration of the model. The transient state calibration was done for the years-2006-2011. The calibrated model was validated with a different data set for the years 2011-2013. To predict the model results and to simulate the future response of the aquifer under changed recharge and pumping, a number of future scenarios were developed. The hydrodynamics of the groundwater flow were studied for two decades i.e.up to year 2033.The results of the future predictions of groundwater levels under Scenario-I, which represent the business as usual conditions, showed that there was a net gain of water levels in upper parts of the study area and lowering of water levels in central and lower parts. A maximum of 5.17m decline and 5m increase in water levels was anticipated in LCC. The percentage of good quality area decreased slightly with 1% change from 2013, whereas 2.5% decrease in area under marginal category was observed while area under unsuitable quality groundwater was expected to be increased from 24.8% to 28.6% in LCC. The predicted results of Scenario-II with increased pumping following historical trends showed an overall decline in the complete LCC. Maximum drawdown is anticipated in Bhagat Sub Division which shows up to 15.68m decline. The area under good quality water will also be significantly dropped from 49% to only 7%. The area under marginal category will have a boom from 41% to 55%, whereas the area under unsuitable category will also be increased manifold from 10% to 38%. The piezometric water levels for the spatially adjusted recharge and discharge patterns under the future scenario-III revealed an overall decline in water levels in the upper four sub divisions, whereas an overall recovery in the water levels was observed in lower five subdivisions of the study area where irrigation recharge was allowed to increase. The area under good quality water which was pre -dominantly in the upper subdivisions have shrinked significantly from 49% to 19%, area under marginal quality groundwater has increased manifold from 41% to 57%. Similar kind of trends were observed in unsuitable category groundwater which has increased enormously from 10% to 24%. The simulation under H3B2 future climate change scenario showed some interesting results. The declining water level trends in all the subdivisions were observed. Tarkhani Sub Division is expected to have maximum dropdown of 4.77m. Minimum drop down in water level was anticipated for Sultanpur subdivision i.e. 0.51m. The predicted results for water quality status shown degraded water quality status in the entire LCC. Only 19.7% area would sustain its status of having good quality of water, 49.3% area will have marginal quality of groundwater whereas 31% area would be converted to unsuitable quality of groundwater in the LCC.
Loading...
Loading...

Similar Books

Loading...

Similar Chapters

Loading...

Similar News

Loading...

Similar Articles

Loading...

Similar Article Headings

Loading...

بشیر احمد ڈار

بشیر احمد ڈار
پاکستان کے مشہور اہل علم اور صاحب قلم جناب بشیر احمد ڈار کی وفات کی خبر دیر میں ملی اﷲ تبارک و تعالیٰ ان کو غریق رحمت فرمائیں، وہ اقبالیات کے بڑے اداشناس اور ماہر تھے، اپنے علمی کمالات کے ساتھ اپنی شرافتِ اخلاق، انکسار اور وضعداری کی وجہ سے اپنے دوستوں اور ملنے والوں میں بہت مقبول تھے۔ (صباح الدین عبدالرحمن، جون ۱۹۷۹ء)

بشیر احمد ڈار
۲۹؍ مارچ ۱۹۷۹؁ء کو پاکستان کے ممتاز، لایق اور مشہور اہل قلم جناب بشیر احمد ڈار اﷲ کو پیارے ہوئے، ان کی وفات کی خبر دیر سے ملی، دکھ ہوا، کہ پاکستان ایک بہت اچھے مصنف، بہت اچھے فلسفی اور بہت اچھے انسان سے محروم ہوگیا۔
۱۹۷۵؁ء سے ۱۹۷۸؁ء تک پاکستان بار بار جانے کا اتفاق ہوا تو جناب بشیر احمد ڈار سے کر اچی، اسلام آباد اور لاہور میں برابر ملاقاتیں ہوتی رہیں، پہلی بار جناب سید حسام الدین راشدی کے دولت کدہ پر ملا، جو کراچی کے ارباب علم و دانش کا صنم خانہ بنا ہوا ہے، معارف کے صفحات پر جناب سید حسام الدین راشدی کا ذکر خیر اکثر آیا ہے، میری نظر میں وہ پاکستان کے پرنس اسکالر ہیں، ان گنت کتابوں کے مایہ ناز مصنف ہیں، اﷲ تعالیٰ نے دولت بھی دی ہے، اس لیے علم دوست اور علم نواز بن کر اپنی مرصع کوٹھی پر علمی محفلیں بھی سجاتے رہتے ہیں، جن میں شریک ہوکر ایسا محسوس ہوتا ہے کہ جہانگیر کے دور میں سندھ میں غازی خاں ترخان کے یہاں بھی ایسی ہی پرکیف مجلسیں ہوا کرتی ہوں گی، ان محفلوں میں جناب بشیر احمد ڈار کا ہونا لازمی تھا۔ جو کراچی میں راشدی صاحب کی زندگی کے جزو لاینفک بنے رہے، شاید ہی کوئی دن ایسا ہوتا جب دونوں کی ملاقاتیں نہ ہوتیں، دونوں کی ملاقاتوں...

Government Auditors' Capabilities to Detect Fraud and The Factors that Influence Them

Fraud is behavior that is contrary to the law carried out by individuals, both from within and outside the organization, with the intention of gaining personal or group benefit while harming other people. This research aims to determine the influence of professional skepticism, competence, independence and ethics on the auditor's ability to detect fraud. The variables of this research are professional skepticism, competence, independence and ethics as variable This research used census techniques, so the number of samples in this study was 56 people. Data analysis in this study used statistical analysis with Statistical Product and Service for Windows version 26.00 (SPSS version 26). The results of this research show that Professional Skepticism has a significant effect on the auditor's ability to detect fraud, Competence has a significant effect on the auditor's ability to detect fraud, Independence has a significant effect on the auditor's ability to detect fraud, Ethics has a significant effect on the auditor's ability to detect fraud.

The Impact of Corporate Governance on Firm Value, Payout Policy, Cost of Capital and Corporate Social Responsibilty.

This study seeks to explore the value of Corporate Governance (CG) practices in Pakistan; a market characterized with week legal investor-protection jurisdiction and concentrated ownership structures. The sample of the study consists of 200 corporate firms listed at the Karachi Stock Exchange for the period 2003 to 2014. The study further categorizes the sample in to small, medium, and large firms on the basis of their market capitalisation. First, this study seeks to explore the value relevance of firm level CG practices in Pakistan. Second, the study examines the influence of CG on the value implication of dividends. Based on the agency theory predictions, the sample of the study is split into high and low governance regimes to examine outcome and substitute agency hypothesis. Third, the study tries to empirically investigate the argument that higher CG is associated with decreased cost of capital. Finally, the study also investigates whether firm-level governance enhances the extent of Corporate Social Responsibility (CSR) in the annual reports. Generalized method of movement results reveal that CG plays a major role in effecting market valuation in Pakistan. The results indicate that a one unit increase in CG is associated with an increase of 0.57 in the value of Q in large Cap firms, followed by medium Cap firms (0.30), and small Cap firms (0.16). In case of joint CG and ownership effect, the results document that low CG rank firms have lower firms value as compare to high CG rank firms. The study also shows that a firm market value varies with the level of its insiders’ ownership, and the pattern of valuation differs relying jointly on CG and insiders’ ownership. The firm is rewarded with higher valuation if it has high CG but lower management ownership, however if the firm has predominant ownership but meanwhile its CG is weak, its firm value is lower. In contrast, the results suggest that the presence of a predominant shareholder adds more value to a small firm. These results imply that in a weak legal protection country such as Pakistan investors look for other indicators such as CG and insiders’ ownership as a guide for seeking additional protection for their investment. The results further documents that stronger governed firms pay higher dividends. The marginal effects presented reveal that a rise of 1 unit in CG score results in an average increase of 0.34 in pool, 0.65 in large, 0.10 in medium, and 0.12 in small Cap firm’s dividend payout ratio. The sample is further split into high and low CG to examine outcome and substitute hypothesis. The results support the outcome agency model which states that high CG ranking firms pay higher dividends than low CG firms. Furthermore, the study also tests the growth opportunities effect. The results suggest that high CG firms with better growth prospects pay lower dividend than otherwise similar firms with poor growth opportunities. On the other hand, the results indicate that weak CG firms distribute similar dividend irrespective of their growth opportunities. Further, the evidence lends support to the hypothesis that CG is an important determinant of enhancing CSR disclosures in annual reports. The results document that low CG rank firms have lower CSR disclosure as compare to high CG rank firms. The results indicate that CG alone is not sufficient to induce firms to provide more CSR information, rather both CG and ownership structure matters in influencing firms’ choice of CSR engagement. The results also show that CG and cost of capital is negatively correlated in large, medium, and small Cap firms. The result confirms the theoretical proposition of the agency theory that investors will be willing to accept a lower risk premium if firms have robust oversight mechanisms to curb managerial opportunism. In case of joint effect of CG and insider’s ownership the results reveal that investors demand lower required rate of return form high CG firms as compare to low CG firms. The results show that firms in the high CG and predominant ownership category pay higher cost of capital as compare to the high CG and low ownership category. Further, for the low CG firms the coefficient on low CG-low ownership category and low CG-predominant category is much higher as compare to high CG-low ownership category. The study also seeks to fulfill the objective about identifying factors that determines firm-level CG. The results indicate that variations in the costs and benefits of different governance practices depend on company’s monitoring and operational characteristics. Furthermore, a one-way ANOVA was conducted to determine if large, medium, and small groups differs in terms of their CG. The results document that there is a statistically significant difference in CG-score between the small Cap and medium Cap firms. Similarly, a statistically significant difference is found between the large Cap and the small Cap firms, and large Cap and medium Cap firms.