Analysis on radiation control and the impact of land pipeline leakage of offshore nuclear power plant on groundwater

Using the groundwater migration and dispersion analytical model, combined with the topography and groundwater characteristics along the land drainage pipeline of an offshore nuclear power plant, the migration and dispersion of six radionuclides (3H, 14C, 137Cs, 134Cs, 60Co, 90Sr, etc.) in groundwater under the condition of pipeline breach accident are predicted. The scope of impact of radionuclides and the annual effective dose caused by drinking water pathways to the public are analyzed. By summarizing the radionuclide concentration and dose index requirements for groundwater at home and abroad, the corresponding environmental impact assessment is given. The prediction results show that the radionuclide concentration and public effective dose at the same distance first increase and then decrease with time, and the peak radionuclide concentration and maximum public effective dose gradually decrease with distance increasing, in other words, the impact of the breach accident on the distance above 30 m is limited.

The Study of Subsurface Land Drainage Optimal Design Model

This paper focused on choosing the best design of subsurface land drainage systems in semiarid areas. The study presented three different soil layers with different hydraulic conductivity and permeability, all layers are below the drain level, and the permeability is increasing with depth. A mathematical model was formulated for the horizontal and vertical drainage optimal design. The result was a nonlinear optimization problem with nonlinear constraints, which required numerical methods for its solution. The purpose of the mathematical model is to find the best values of pipes and tubewells spacing, groundwater table drawdown, and pumps operating hours which leads to a minimum total cost of the subsurface drainage design. A computer code was developed in MATLAB environment and applied to the case study. Results show that the vertical drainage was economically better for the case study drainage network design. And the main factor affecting the mathematical model for both pipe and well drainage was the distance between pipes and tubewells. In addition, considering the lifespan of vertical drainage project, the optimal design involves the minimum possible duration of pumping stations. It is hoped that the proposed optimal mathematical model will present a design methodology by which the costs of all alternative designs can be compared so that the least-cost design is selected.

Cycles of Catastrophic Debt

This chapter investigates cycles of debt crises, which occur when poor countries cannot make the payments on their loans. There are many stories of how debt crises have produced underdevelopment, but one of the most compelling is that of Egypt in the nineteenth century. Of all the nations in the Middle East, Egypt was the most primed to have an industrial revolution. It invested in bona fide development projects, including railroad building, land drainage, and building the Suez Canal. However, it spent a fortune rebuilding Cairo to make it look European and fought wars with Turkey and the Sudan, while its leaders enjoyed pharaonic lifestyles. By the mid-nineteenth century, Egypt was heavily in debt. A similar process occurred in Latin America when it got itself into serious debt problems in the 1970s. Some of the money went to development projects, some went to antipoverty projects, and some was just siphoned off. Venezuela's elite bought more foreign assets in 1981 than the entire value of the loans that were negotiated that year. When the crunch came, the International Monetary Fund insisted that the Latin American governments shrink their government expenditure in order to pay their debts. This meant that most nations in Latin America reduced their expenditure on public health and hospitals, education, and programs for the poor.

Study on the Implementation of Drainage System at Universiti Tun Hussein Onn Malaysia (UTHM)

Drainage systems play an important role in the development of managing surface runoff water. This is because without proper management of the drainage system, it can cause flooding in the area. Universiti Tun Hussein Onn Malaysia (UTHM) has suffered floods and caused significant losses. Therefore, the purpose of this article is to study the types of drainage systems available around the UTHM area. In this regard, semi-structured interviews were conducted with a number of respondents from the Development and Maintenance Office UTHM to study the problems of each existing drainage system around the area and to look at ways of improving the existing drainage system. The types of drainage systems available at UTHM have been identified as conventional drainage systems, Urban Stormwater Management Manual (MSMA), monsoon drainage, main drainage and land drainage. Problems such as drainage system, waste and clogged drainage also being identified. Among the improvements identified are replacing MSMA with open drainage. In conclusion, the study of drainage system implementation at UTHM can provide a clearer picture of the drainage system used around the study area.

Regulations governing the impact of the aquatic environment on transport in the Kingdom of Poland: removing obstacles from the rivers, creating riverside public spaces and signs and land drainage

This work focuses on several aspects of water-related transportation laws as well as drainage law introduced in the Kingdom of Poland before 1860. Thus, while focusing on a) laws concerning the removal of diverse type of obstacles from the rivers used for official navigation; b) establishing of riverside towing routes; c) construction of rivers verst signs on the river banks, this research also deals with the introduction of provisions concerning draining and receiving of waters, which had a huge impact on the road construction and maintenance process in Poland for the first half of the 19th century.

Land Drainage Development Processes and Changes in the Context of Runoff Change in Northern Lithuania

The impact of the drainage of excessively wet land on river runoff has so far been assessed differently and very carefully because of its complexity and diversity. The article analyses changes of drained land areas and runoff in the river basins of Mūša, Lėvuo Tatula and Nemunėlis. Wet land areas in the Mūša, Lėvuo and Nemunėlis rivers basins account for more than 70% from the total basins area and in the Tatula about 90%. Increase of drained land areas in the studied river basins has no significant influence on the change of river runoff. Studies have shown that the change in drained land areas did not affect the change in runoff height. Drainage does not have a significant effect on changes in the annual runoff distribution of the studied rivers.