In this paper we consider the consistency and stability analysis of the modified convection diffusion equation: which describes the mass transfer of chlorine in contact tank water disinfectant. We employ the concept of Dufort-Frankel based on Richardson’s scheme to discretize the modified equation. This resulted to a numerical scheme algorithm. The consistency was analyzed by Taylor’s expansion of the discretized scheme, which was found to be consistent with the original modified equation. In addition, stability was analyzed by using matrix method. The numerical computation results showed that the scheme was conditionally stable. This has been concluded by numerical computations to illustrate the consistence and stability of the scheme.

Today, the world and other professions face more challenges such as climate change, environmental degradation, over population, soil pollution along with the advancement in technology system and software. Roles of Surveyors also change, this does not mean that measurements are no longer relevant but processes, interpretation and management of the data gathered. Photogrammetric mapping and survey technology has evolved both in terms of data collection and processing, especially on data collection techniques using Unmanned Aerial Survey (UAS). Based on the purpose and significance of this research the project cover about Seventy-four hectares (74 hectares) of land having Seven (7) ground control points (GCPs) and Four (4) Checkpoints. The project covers a portion of Federal college of Education (Special) Oyo, after the flight which was flown according to the pre-defined and planned flight, Orthophoto and DTM were generated alongside the quality assessment report of the project after processing. The map accuracy was then assessed and defined in terms of the horizontal (position) and vertical accuracy and they are 3cm (RMSE= 7cm) and 9cm (RMSE= 7cm) respectively. However, it could be concluded that the Orthophoto and DTM generated from UAV can be employed in achieving accurate mapping because it falls within the allowable mapping error limit and RMSE according to the American Society for Photogrammetry and Remote Sensing and National Standard for Spatial Data Accuracy. This paper has been able to look into the geometric quality through geometric accuracy and resolution of its products which makes it fit for compilation of topographical map, cadastral maps, engineering survey maps etc.

The haematological parameters like RBC counts, Haemoglobin %, Monocytes, Eosinophil and Basophil were significantly decreased whereas WBC counts, Lymphocytes and Neutrophil were significantly increased in nickel exposed fishes. The results indicate that nickel is toxic at higher concentration. The fish species is therefore recommended as good bioindicator for the risk assessment of aquatic environment due to nickel.

Lakes are the natural reservoir of the aquatic resources. The Alwara lake is a part of village Alwara, which is located in Sarsawan block of Manjhanpur tahsil of Kaushambi district of Uttar Pradesh. This lake is a natural perennial wetland. It is surrounded by agricultural fields and connected to the river Yamuna and covers about more than 400 hectares. In this lake, the water level falls during summer and winter but rises during rainy season. The lake has derived its name from village Alwara. Locally it is called Alwara taal. The environmental condition of this lake supports the survival of a large number of fish species and avian species including Indian Sarus crane. Present article discusses that Alwara lake is suitable for fishes and Sarus cranes.

Manual plant watering has been an insistent problem in this era of technological advancement. An automatic sprinkler system for plant and automatic refill system for water fountain is a practical solution to minimize water loss and human errors encountered in manual watering. This project is a microcontroller based automatic refill system for water fountain and automatic sprinkler system for plants. It uses an ATmega328P microcontroller (MCU) IC that serves as the brain incorporated with a Real Time Clock (RTC) module to turn ON the sprinkler pump at a designated time and a soil moisture sensor that monitors the water level in the soil by comparing it with a preprogrammed threshold value. A float switch constantly monitors the water level in the fountain. When the water goes below a desired level, the float switch sends signal to the microcontroller that turns on the refill pump and when the water is at optimal level the refill pump automatically turns off. This project can improve the standard of living for humans and add instant beauty to our surroundings. The benefits of this project cannot be over emphasized.