Failure process of acrylic polyurethane coating under alternate wetting and drying condition

2015 ◽  
Vol 132 (20) ◽  
pp. n/a-n/a ◽  
Author(s):  
Yu Zuo ◽  
Liang Zhang ◽  
Xuhui Zhao ◽  
Yuming Tang ◽  
Xiaofeng Zhang
Keyword(s):  
Failure Process ◽  
Polyurethane Coating ◽  
Wetting And Drying ◽  
Alternate Wetting And Drying ◽  
Drying Condition ◽  
Acrylic Polyurethane

scholarly journals Long-Term Strength of Porous Geomaterials by a Micromechanical Model considering Alternate Wetting and Drying Condition

Geofluids ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Jin Zhang ◽  
Shirong Fu ◽  
Tao Ni ◽  
Bei Han ◽  
Chong Shi
Keyword(s):  
Water Pressure ◽  
Micromechanical Model ◽  
Boundary Surface ◽  
Solid Matrix ◽  
Term Strength ◽  
Wetting And Drying ◽  
Alternate Wetting And Drying ◽  
Drying Condition ◽  
Variable Water

This study is devoted to determining the long-term strength of porous geomaterials under alternate wetting and drying condition by statical shakedown analysis. In the framework of micromechanics of porous materials, Gurson’s hollow sphere model with Drucker-Prager solid matrix is adopted as the representative volume element. The effects of alternate wetting and drying are considered as variable water pressure imposed on the inner boundary surface of the unit cell. The cyclic responses are separated as a pure hydrostatic part under compressive/tensive loads and an additional deviatoric part to capture shear effects. The reduction of the long-term strength due to inner water pressure is observed by the illustration of obtained macroscopic criteria with respect to various load parameters. In addition, the accuracy of the analytical solution is also verified by comparing to the results of FEM-based step-by-step computations.

scholarly journals Root Traits Enhancing Rice Grain Yield under Alternate Wetting and Drying Condition

2017 ◽  
Vol 8 ◽  
Author(s):  
Nitika Sandhu ◽  
Sushil R. Subedi ◽  
Ram B. Yadaw ◽  
Bedanand Chaudhary ◽  
Hari Prasai ◽  
...  
Keyword(s):  
Grain Yield ◽  
Root Traits ◽  
Rice Grain ◽  
Wetting And Drying ◽  
Alternate Wetting And Drying ◽  
Drying Condition

scholarly journals Arsenic Accumulation in Rice Grain as Influenced by Water Management: Human Health Risk Assessment

Agronomy ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1741
Author(s):  
Israt Jahan Harine ◽  
Mohammad Rafiqul Islam ◽  
Mahmud Hossain ◽  
Hasina Afroz ◽  
Rounok Jahan ◽  
...  
Keyword(s):  
Water Management ◽  
Health Risk ◽  
Management Practices ◽  
Human Health Risk ◽  
Rice Grain ◽  
Wetting And Drying ◽  
Straw Yield ◽  
Alternate Wetting And Drying ◽  
Drying Condition ◽  
1000 Grain Weight

Rice is a staple food for humans and a key source of soil arsenic (As) transfer to the human food chain. As a result, it is critical to develop ways for reducing As accumulation in rice. A pot experiment with seven different water management practices was done to examine the impacts of water management on rice (cv. BRRI dhan28) growth, yield, and As accumulation in rice grain. Any health risk due to As accumulation in rice grain was also determined. The soil used in the experiment was artificially contaminated with As and the source of As was sodium arsenate (Na2HAsO4 7H2O). Water management practices affect different plant growth and yield parameters including filled grains per panicle, unfilled grains per panicle, 1000-grain weight, grain yield and straw yield of rice. The number of filled grains per panicle and 1000-grain weight were found to be at their highest in the T7 (alternate wetting and drying) condition, whereas the number of unfilled grains per panicle was at its lowest in the same treatment. The T7 also demonstrated the highest grain yield (21.08 g/pot) and straw yield (22.02 g/pot), whereas the lowest values were noted in T1 (flooding throughout the growth period). The highest As concentration in rice grain (0.52 mg kg−1) was found in T1 and the lowest As concentration in grain (0.27 mg kg−1) was found in T7. Estimation of the human health risk revealed that the non-carcinogenic risks (HQ > 1) and carcinogenic risks (CR > 1.0 × 10−4) were greatly affected by different water regimes. The rice plant grown under alternate wetting and drying condition (T7) showed the lowest health risks compared to other water management practices. Thus, alternate wetting and drying conditions are a good water management strategy for increasing rice output while reducing arsenic buildup in rice grain.

The potential for expansion of irrigated rice under alternate wetting and drying in Burkina Faso

2021 ◽  
Vol 247 ◽  
pp. 106758
Author(s):  
Komlavi Akpoti ◽  
Elliott R. Dossou-Yovo ◽  
Sander J. Zwart ◽  
Paul Kiepe
Keyword(s):  
Burkina Faso ◽  
Wetting And Drying ◽  
Irrigated Rice ◽  
Alternate Wetting And Drying

Diagnosis and management of green algae in low land paddy fields of Cauvery delta zone, Tamil Nadu

2021 ◽  
Vol 58 (1) ◽  
pp. 33-42
Author(s):  
M Jeya Bharathi ◽  
M Raju ◽  
S Elamathi
Keyword(s):  
Green Algae ◽  
Tamil Nadu ◽  
Rice Cultivation ◽  
Rice Root ◽  
Wetting And Drying ◽  
Alternate Wetting And Drying ◽  
Green Algal ◽  
Algae Growth ◽  
Cauvery Delta ◽  
Soil And Water

Rice is a prime food crop for Asian countries. Wet land rice cultivation contributes maximum grain yield than dry land rice. Cauvery delta is a predominant area for rice cultivation in Tamil Nadu. Green algae growth during Kuruvai (June -August) season is a serious problem in wet land rice. These algae growth create anaerobic condition and prevent rice root respiration. The entire rice root was uprooted and floated on the stagnated water during initial stage. There is no preliminary study for green algae control in rice field. Soil and water samples were collected and analyzed for the nature of occurrence. Laboratory and field experiments were conducted to find out the remedial measures. The results of soil and water sample analysis showed that use of bore well water and dumping of phosphatic fertilizers leads to salt accumulation which favours the green algal growth. The results of the laboratory experiment revealed that the CuSO4 londox power, propiconazole and hexaconazole showed moderate inhibition on 5th day after treatment. The findings from field experiment indicated that use of conoweeder, alternate wetting and drying and CuSo4 drenching @ of 2.5 kg/ha when green algae appearance has just noticed or 5.0 kg/ha when severe growth occurred was effective in managing the green algae. Among all measures, alternate wetting and drying is the best management practices. CuSO4 drenching reduces around 70% of the growth. Even though CuSO4 react negatively with algae growth, soil pH changes and salt concentration play a major role on the CuSO4 action towards green algae. In order to maintain soil health condition, biofertilizer application, crop rotation, green manure trampling to be practised to recover the soil from alkaline pH, removal of accumulated salt and to control the algae growth using CuSO4.

scholarly journals Impact of alternate wetting and drying on farm incomes and water savings in Bangladesh

2020 ◽  
Author(s):  
Ujjayant Chakravorty ◽  
◽  
Manzoor H Dar ◽  
Kyle Emerick ◽  
◽  
...  
Keyword(s):  
Wetting And Drying ◽  
Water Savings ◽  
Alternate Wetting And Drying ◽  
On Farm
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