Heavy rainfall

The paper "The role of orographic effects on heavy rainfall event over central Vietnam in October 2021" use observation data and high-resolution (3 km) simulations from the WRF model, driven by FNL data, to investigate the causes of heavy rain over Central Vietnam from 22nd to 29th October 2021. Our findings confirm the significant role of topography in causing heavy rain. In terms of the atmosphere’s vertical structure, the surface’s northeast wind, almost perpendicular to the Central region’s topography, combined with the east wind and trade winds above, caused strong convection.

11p tukhauquantuong1011 22-04-2024 4 2   Download

Ebook "Tropical cyclone activity over the North Indian Ocean" deals primarily with understanding, monitoring and prediction of Tropical Cyclones (TCs) over the North Indian Ocean (NIO). There is special emphasis on TC genesis, intensification, movement and associated adverse weather like heavy rainfall and gale winds. It highlights the current state of research on TCs over the NIO and recent improvements in early warning systems due to advances in observational, analytical and numerical weather prediction techniques.

385p tachieuhoa 28-01-2024 5 2   Download

We developed a prototype system of the very short-range forecast of precipitation in Vietnam by merging kinematic extrapolations of composite hourly rainfall analysis and NWP, verified its performance for the case of a heavy rainfall event in July 2021 over central Vietnam. First, we produced hourly composite rainfall analysis over Vietnam with a grid distance of 5 km using AWS, radar, and satellite data.

21p vishekhar 01-11-2023 1 1   Download

Real-time monitoring of quantitative precipitation distribution is essential to prevent natural disasters caused by heavy rainfall. Precipitation distribution by rain gauge network or combined with radar/satellite data is operationally used in Viet Nam.

12p vishekhar 01-11-2023 4 1   Download

In this study, the WRF model is used to investigate the role of Central Vietnam terrain on occurrence of the heavy rainfall event in November 1999 over Central Vietnam. Two model experiments with and without terrain were performed to examine the orographic blocking effects during the event.

6p vipagani 24-10-2022 7 3   Download

In this paper, we use Genetic Programming (GP) to predict if there will be heavy rain the next day. GP is an evolution-based machine learning methodology that can identify the model’s functional form as well as its numerical coefficients. Our model was trained and evaluated on a data set collected from 17 stations in Vietnam’s provinces.

11p vikissinger 03-03-2022 12 1   Download

The results indicate a statistically significant increase in extreme rainfall at the expense of light, moderate, and heavy rainfall over time. The only negative relationship is found in dry days. The most statistically significant trends exist in the 99th percentile, maximum, and R100 parameters with p-values of 0.07, 0.08, and 0.11, respectively

10p thebadguys 15-01-2022 10 0   Download

In urban areas, flooding can be very serious due to high population density and important infrastructure. As rainfall data at high temporal and spatial resolutions are required as input for urban flooding forecast, in this study, the Weather Research and Forecasting model (WRF) with four nests, two-way interaction is used to simulate the heavy rainfall event in Hanoi from 30/10/2008 - 01/11/2008 to investigate model ability on generating rainfall data on high temporal and spatial resolutions.

4p viwendy2711 05-10-2021 9 1   Download

Early blight is the most devastating disease of tomato it is caused by pathogens i.e. Alternaria solani. In tropical and subtropical countries it creates hazardous effect. It is also a common problem in United Kingdom, Australia, India, Nepal and United States. It is one of the most common foliar diseases of tomatoes. The disease can occur over a wide range of climatic conditions, but is most prominent in areas with heavy dew, rainfall and high relative humidity. Every year sever disease appears in north India.

6p chauchaungayxua10 19-03-2021 18 3   Download

On 9 December 2018, a heavy rainfall event occurred in central Viet Nam, and at Da Nang, a record–breaking rainfall of 972 mm was observed in 24 hours. The operational precipitation analysis at the Viet Nam Meteorological and Hydrological Administration (VNMHA) on the day considerably underestimated the intense rains. We checked causes of underestimation and modified the precipitation analysis by revising the use of observation data from Automated Weather Stations (AWS) and meteorological radar data.

15p cothumenhmong8 05-11-2020 8 2   Download

Field experiments were conducted at Instructional Farm, Navsari Agricultural University, Navsari during kharif and summer seasons of 2010-11 and 2011-12 to know the effect of intra row spacing and weed management in cotton under heavy rainfall zone of South Gujarat.

10p kethamoi7 26-08-2020 10 2   Download

Lakhimpur is a district of Assam which is most frequently affected by flood due to its topography. During periods of heavy rainfall in this region, sali (winter) rice is mostly affected and farmers suffer a great loss in income. Thus, considering the loss of the farmers, Krishi Vigyan Kendra Lakhimpur has introduced stress tolerant rice variety “Ranjit sub-1” developed by Assam Agricultural University in few pockets of the district. The variety was demonstrated during 2018-19 and 2019-20 using improved cultivation practices.

7p caygaocaolon6 30-07-2020 14 1   Download

A dynamic growth model (CO2FIX) has been used for estimating the carbon sequestration potential of Burans (Rhododendron arboreum), an indigenous medicinal plant of higher hills of western Himalayan region. The present study has been carried out in the campus of V.C.S.G. College of Horticulture, U.U.H.F., Bharsar, Pauri Garhwal, Uttarakhand. The temperature and rainfall of this hilly area ranged from - 4.0 to 28.0o c. It is capable of thriving on snow and heavy rainfall condition. CO2FIX was parameterized for a simulation of 50 years respectively.

6p angicungduoc6 20-07-2020 10 1   Download

A dynamic growth model (CO2FIX) has been used for estimating the Carbon Sequestration Potential of Kafal (Myrica esculenta), an indigenous multipurpose tree used for timber, fuel wood, fiber and in addition to its medicinal value. The present study has been carried out in the campus of V.C.S.G. College of Horticulture, U.U.H.F., Bharsar, Pauri Garhwal, Uttarakhand. The altitude of the location is ranging from longitude 78.59’:20.28’E, latitude 79.00’:30.05’N and 2000 m MSL altitude. The temperature and rainfall of this hilly area ranged from -4.0 to 28.

7p nguaconbaynhay6 24-06-2020 7 0   Download

The paper presents the verification of capacity of heavy rainfall forecast IFS model by using the dataset of 75 automatic rain gauges collected of 59 heavy rainfall events of 2011-2018 rainfall seasons. The verification results based on ME, MAE, RMSE, R, BIAS, POD, FAR and ETS indices shown that the heavy rain forecast of IFS has good skill in forecast range of 1-3 days ahead. In addition, rainfall forecast of IFS model is over-estimated at small and medium rainfall thresholds and under-estimated in large and extreme large rainfall thresholds.

8p quenchua5 14-05-2020 9 1   Download

Flood is one of the most dangerous natural disaster in Vietnam. Assessing flood hazard is a long term ambition of the society, especially in low-land cities where almost its communities expose to flood caused by heavy rainfall over its upstream river basin. In order to do that, designing flood events is one of the very first step. This paper evaluates some methods of flood design and give an advise for choosing relavant method in Vietnam which have been test in Vu Gia Thu Bon river basin.

9p quenchua5 14-05-2020 13 1   Download

Fruit rot or Mahali disease of Arecanut (Areca catechu L.) is a serious threat from countries in those regions which receives heavy rainfall during kharif season specially, malnad, hilly and coastal regions of Karnataka. Arecanut grown in these regions are highly prone to the occurrence of the fruit rot disease resulting in severe loss in yield Therefore, present investigations were carried out during 2015-17, at three different locations viz., Koluru, Manchale and Melige of Shivamogga districts of Karnataka, India.

11p kethamoi2 15-12-2019 15 1   Download

Improving agricultural water productivity, under rainfed or irrigated conditions, holds significant scope for addressing climate change vulnerability. It also offers adaptation capacity needs as well as water and food security in the southern African region. In this study, evidence for climate change impacts and adaptation s trategies in rainfed agricultural systems is explored through modeling predictions of crop yield, soil moisture and excess water for potential harvesting.

17p mentospurefresh 29-11-2019 47 1   Download

In this paper, a heavy rainfall event in the northern region of Vietnam in August 2008 was selected for simulation, using a Weather Research and Forecast (WRF) model and combining with ensemble simulation method.

8p vilusaka2711 18-11-2019 14 0   Download

This paper explores the maximum amount of rainfall in the Central coastal provinces of Vietnam (Quang Binh case study) for return periods of 5 years, 10 years, 20 years, 50 years, and 100 years, which correspond to frequencies of 20%, 10%, 5%, 2%, and 1%, respectively. The results show that at a frequency of 20%, the maximum intensity of rain during a heavy rain spell can range from 636.6 to 696.0 mm, while the maximum one-day amount received was over 300 mm, which can occur many times in 5 years. At a frequency of 1%, the intensity of rain during a heavy rain spell can range from 1,197.

8p caygaocaolon1 13-11-2019 20 0   Download