Browsing by Author "Nazia Hassan"

Filter results by typing the first few letters
Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    Assessment of environmental parameters in relation to different agro-water management practices in south-west coastal region of Bangladesh
    (Department of Institute of Water and Flood Management (IWFM), 2011-02) Nazia Hassan; Mondal, Dr. M. Shahjahan
    Salinization of productive agrieulturuJ. land~ in ~outhwcstern cou.srnl Fl;mgladcsh and their reclamation are getting distinct importan~e lo the local people as well a~ policy makers. Salinization hll~ heen cstablished as th~ prime causc of environmental d~gradati"n in the region ami there is an urgency to lind out a water mallag~menl practice which is economically b~nelieiaL socially acceptable llnd environmentally sustainable. Keeping thcse viewpoints, this ~llldy was undeltaken to e\aluate the present statuses 0 f di [fcrcnt agro-\\(aler manllgemenl practices in Dumuria Upazila, to carry out 1 Type-4 AWMP > Type-2 AWMP> Type-l AWMP. Thc dcgree of cOITelalion of economic paramelers with quality and management parameters wa, used In give weightage of parameter:<. in MCA - a strong relation (P < 0.01) was given a high weightage and a mO(krat~ relation (0.01 < P < 0.10) was gi\'en a low weighlagc. Thus the Type-2 AWMP got lh~ highest 100al average score and appear~d to b~ Ih~ hest AWMP. This ,vas due to th~ commLlnity management approach for conlrolling saline watcr into the ghers, use of more organic fertilizer, usc of IPM t~chniqu~~, le~s cropping intensity, less deterioration of soil and water lj\llllily, higher economic return, etc. So, IrolTI this study it can he said that th~ ~onmnllla[ approach in water management for I-lYV boro rice cultivation \\(ith!1 crop rotation of golda-bagda-\vhite fish i, the best AW!vlP among the current practices in the study area
  • Thumbnail Image
    Item
    Assessment of environmental parameters in relation to different agro-water management practices in south-west coastal region of Bangladesh
    (Departmetn of Water Resources Engineering, 2011-02) Nazia Hassan; Mondal, Dr. M. Shahjahan
    Salinization of productive agricultural lands in southwestern coastal Bangladesh and their reclamation are getting distinct importance to the local people as well as policy makers. Salinization has been established as the prime cause of environmental degradation in the region and there is an urgency to find out a water management practice which is economically beneficial, socially acceptable and environmentally sustainable. Keeping these viewpoints, this study was undertaken to evaluate the present statuses of different agro-water management practices in Dumuria Upazila, to carry out laboratory analyses of selected soil and water quality parameters of agricultural fields, and to assess the environmental consequences of those farming practices. Four different types of agro-water management practices (AWMPs) with three ghers under each practice were selected for investigation. Several important soil and water quality parameters (temperature, salinity, pH, EC, TDS, DO, HCO3 -, Ca2+, Mg2+, Cl-, Na+, K+, SO4 2-, NO3 -, etc.) during the pre- and post-boro season of 2009- 10 were analyzed to calculate the mean soil and water quality change indicators (MSQI, MWQI). Besides these, management parameters, such as cropping pattern, irrigation, water exchange, use of fertilizer, use of pesticide, number of years of boro cultivation, vegetation on gher dykes, etc., and economics of production were considered for evaluation of best practices among different AWMPs using multicriteria analysis (MCA). The highest deterioration of soil quality was found in the Type-3 AWMP and the lowest in the Type-2 AWMP. In case of water quality, the order of deterioration was found to be: Type-3 AWMP > Type-4 AWMP > Type-2 AWMP > Type-1 AWMP. The degree of correlation of economic parameters with quality and management parameters was used to give weightage of parameters in MCA – a strong relation (P < 0.01) was given a high weightage and a moderate relation (0.01 < P < 0.10) was given a low weightage. Thus the Type-2 AWMP got the highest total average score and appeared to be the best AWMP. This was due to the community management approach for controlling saline water into the ghers, use of more organic fertilizer, use of IPM techniques, less cropping intensity, less deterioration of soil and water quality, higher economic return, etc. So, from this study it can be said that the communal approach in water management for HYV boro rice cultivation with a crop rotation of golda-bagda-white fish is the best AWMP among the current practices in the study area