Tổng hợp tài liệu Đồ Án - Luận Văn tham khảo cho học sinh, sinh viên.
Recently, water quality has degraded seriuously in the Han Quang watershed belonging to service area of the Bac Duong irrigation system. Exceeded fertilizer application on rice fields was considered as a main cause. This paper aims to assess impact of change in fertilizer application on variation inboth NH4 and NO3 concentration in drainage cana...
8 trang | Chia sẻ: honghp95 | Ngày: 30/11/2020 | Lượt xem: 532 | Lượt tải: 0
Cu Chinh Lake is a small-sized, shallow lake in the inner city of Hanoi, facing many water quality problems, especially eutrophication. Understanding the characteristics of eutrophication in the lake is one of the necessary scientific basis for proposing solutions to water quality management and control.With that significance, this study gives s...
10 trang | Chia sẻ: honghp95 | Ngày: 30/11/2020 | Lượt xem: 585 | Lượt tải: 0
Water allocation is one of the most important outcomes of a water resources planning, espcially in the context of water conflict, scarcity, pollution in many regions around the world. In order to determine the amount of water that can be allocated, it is necessary to calculate a number of water resources components, possibly causing difficulties...
7 trang | Chia sẻ: honghp95 | Ngày: 30/11/2020 | Lượt xem: 627 | Lượt tải: 0
The purpose of the research aims to examine effects of water hyacinth (Eichhornia crassipes) on surface water environment of Tran Van Dong canal in Go Cong Dong district, Tien Giang province and proposing solutions to make microbial organic fertilizers. In general, there were some water quality parameters such as DO level, organic matters (BOD5,...
8 trang | Chia sẻ: honghp95 | Ngày: 30/11/2020 | Lượt xem: 625 | Lượt tải: 0
Along with the national development, agriculture, rural areas gradually have been changed: the infrastructure have been invested and upgraded step by step; material life, spirit of rural residents have been improved more and more. However, during the development process, rural environmental pollution is increasing due to waste generated from cul...
7 trang | Chia sẻ: honghp95 | Ngày: 30/11/2020 | Lượt xem: 671 | Lượt tải: 0
The objective of this study is to forecast meteorological droughts in the Mekong Delta using Artificial Neural Networks (ANN). Standardized Precipitation Index (SPI) was first calculated to determine 3 and 6 - month droughts for current period of 1980-2013; and SDF (Severity – Duration – Frequency) curve was then established. ANN for meteorologi...
8 trang | Chia sẻ: honghp95 | Ngày: 30/11/2020 | Lượt xem: 635 | Lượt tải: 0
Mangrove soil stores a high amount of organic carbon, however one part of this source emitted towards the atmosphere as CO2. The objective of the present study was to determine the influence of biofilm on CO2 fluxes at the soil-air interface of mangrove forest. Fluxes were measured using dynamic closed incubation dark chamber connected to an inf...
8 trang | Chia sẻ: honghp95 | Ngày: 30/11/2020 | Lượt xem: 733 | Lượt tải: 0
Water contamination is not only caused by water resources but also by the water distribution system,contaminants that exist in the soil environmentintrusion into the water environment through crack on the pipe wall.Even if the distance between sewer pipes and water supply pipes is installed to follow the standard, the risk of cross-contamination...
7 trang | Chia sẻ: honghp95 | Ngày: 30/11/2020 | Lượt xem: 612 | Lượt tải: 0
Nghiên cứu đã áp dụng thành công mô hình thủy văn bán phân bố SWAT để mô phỏng dòng chảy và tải lượng bùn cát về 4 hồ chứa lớn ở thượng nguồn lưu vực sông Vu Gia – Thu Bồn trong thời gian 31 năm, từ năm 1980 – 2010. Kết quả hiệu chỉnh và kiểm định đều cho kết quả tốt cả ba chỉ tiêu thống kê sai số bình phương trung bình (RMSE), hệ số Nash-Su...
9 trang | Chia sẻ: honghp95 | Ngày: 30/11/2020 | Lượt xem: 711 | Lượt tải: 0
In the design practice of urban storm water drainage systems, the design rainfall intensity formula or the rainfall intensity-duration-frequency relationship (IDF) is usually used in therational formula to estimate design flow rate of drainage sewers. The parameters of IDF relationship presented in the current drainage system design criterion of...
10 trang | Chia sẻ: honghp95 | Ngày: 30/11/2020 | Lượt xem: 909 | Lượt tải: 0
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