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Rivers not only maintain the ecological balance but also generate resources. Fishes and riverbed materials such as sand, cobble, pebble, boulders, etc. are the sources of income from natural rivers; and these are the important resources in the construction industry.There exist very few studies on the effects of riverbed extraction in the rivers like Tinau. The lack of generic hydrological and climatic data in the river catchment leads to the lack of knowhow regarding the hydrological behavior of the river basin and its consequences over time. This study is the outcome of the literature review on riverbed extraction and its effects on the aquatic environment particularly in the Tinau River. Riverbed extraction can cause many effects on the environment. But this paper mainly focuses on the effects of riverbed extraction on the hydraulic structures, ground water, river morphology, cost externalization, fish species and fisheries for livelihood.DOI: http://dx.doi.org/10.3126/hn.v11i0.7163 Hydro Nepal Vol.11 2011 pp.49-56

A study on the effect of climate change and associated factors on the production and productivity of wheat (Triticum aestivum L.) over last 25 years in the Terai region of Nepal was conducted. Three major wheat growing districts of Nepal (Kanchanpur, Rupandehi and Dhanusha) were focused. Climate and wheat management data were deployed. Farmers' feedback was taken through a set of semi-structured questionnaire followed by one day workshop cum seminar. Focus Group Discussion (FGD) was also conducted in the field. Comparison over 25 years showed that rainfall during wheat season declined significantly while maximum temperature increased by over 10C. Mean minimum temperature showed slight decline. Farmers' interaction indicated that growth period of wheat appeared to reduce over years, while new diseases/races and weeds have emerged. This led to increase in use of chemical pesticides. Use of inputs such as chemical fertilizers increased significantly leading to increased production cost by many folds. Despite limitations, wheat farming area and production has increased significantly in the past 25 years. The major issues for farmers were found to be a deficit of inorganic fertilizers, insufficient supply of quality seeds and an unsystematic market. The coping mechanism for climate change in wheat farming in all the three districts was not applied due to lack of knowledge, facilities and access to improved technologies. The farmers expected advanced technological know-how along with other facilities for climate resilient wheat farming.International Journal of Environment Volume-4, Issue-3, June-August 2015Page:

A study on “Assessment of low bidding in bridge construction of Nepal” was conducted during the period from January 2018 to May 2018. The method of the study was on the basis of secondary literature received from different sources and field observation. The purpose of the study was to overview low bidding and its influences on bridge construction. It has been realized that low bidding has significant role on time delays, cost overrun and quality degrade in bridge construction and as a result, users are closely suffering from inconvenience on transportation along with scarcity, hunger and diseases. Low bidding, itself is not a problem whereas it has got wide uses in all over the world with acceptance as more scientific and reliable process. In the context of Nepal, causes like political protection, zero punishment, expectation of mobilization advance for company survival, increment of turnover and inadequate study before bidding played key role on low bidding. The study found that low bidding has huge effects like arises fraud practices, misuse of muscles and power, claims and dispute, variation order and loss of professional reputation. True practices based on right effects with right causes can unfolds the positive aspects of low bidding like promotion to healthy competition, encourages towards corporate culture, equal opportunities to all parties and utilization of saved amount on further works.

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