What effect does raising a lake have on the hydrological properties of the soil?5 answersRaising a lake can significantly impact the hydrological properties of the soil in its vicinity. Studies have shown that the formation of a thermokarst lake can reduce the water holding capacity of alpine meadow soil, leading to increased hydraulic conductivity and decreased runoff capacity. Additionally, the construction of a lake can improve soil physiochemical properties and microorganism activity in adjacent grassland soil, with increased soil water content, total nitrogen, total organic carbon, and microbial biomass observed closer to the lake. Furthermore, the presence of lakes can influence soil hydraulic properties, such as total porosity, soil organic carbon content, and water retention characteristics, leading to enhanced infiltration rates and water conservation potential in agricultural fields.
What are impacts of heavy rainfall on tourism?4 answersHeavy rainfall significantly impacts tourism by affecting tourist flow, hotel performance, and water quality. Tourist destinations like Konkan experience reduced tourist numbers during the rainy season, leading to financial losses for hospitality firms. Abnormal weather conditions, including heavy rain, influence hotel performance indicators such as occupancy and revenue per available room, with tourists preferring full-service hotels during heavy rain situations. Additionally, heavy rainfall can deteriorate the quality of surface waters, increasing bacterial and viral counts, making primary recreational activities in water catchments inadvisable during or after rainfall events. Strategies like rain tourism, rain risk management models, and rainfall option contracts are being explored to mitigate the negative impacts of heavy rainfall on tourism and hospitality industries.
Can rainfall effect the concentration of nutrient in lake water?5 answersRainfall can have an effect on the concentration of nutrients in lake water. Heavy rainfall events can lead to an increase in nitrogen and phosphorus concentrations in rivers and lakes, which can contribute to algal and cyanobacterial blooms. The increase in nutrient concentrations can be caused by external nutrient spikes from flooded upstream wetlands during heavy rain events. Additionally, rainfall can promote algal growth in lake zones by increasing nutrient concentrations, particularly phosphorus. Extreme rainfall events can also result in changes in water quality, such as increased ortho-phosphate concentrations, and can have long-term effects on nutrient dynamics and phytoplankton composition in lakes. Atmospheric deposition from rainfall can contribute to nutrient input into lakes, with estimates suggesting that it accounts for a significant portion of new nitrogen and phosphorus input into lake ecosystems.
How rainfall influences sewage characteristics?5 answersRainfall events have a significant impact on sewage characteristics. During rain events, rainwater enters the combined sewer system, causing additional hydraulic and pollutant load. This influx of rainwater can lead to overflow structures being constructed to reduce discharge, which can be hazardous to the environment. Infiltration and inflow of rainwater into sewers is a major problem, and climate forecasts indicate that the negative impact of rainwater on water quality will increase. Heavy precipitation can result in increased flow and infiltration in sewage systems, leading to flooding and overflows. Rainfall can also cause changes in effluent quality indicators at wastewater treatment plants, such as pH and temperature. Overall, rainfall events can significantly influence sewage characteristics, leading to increased hydraulic and pollutant load, overflow hazards, and changes in effluent quality indicators.
How rainfall impact water quality?4 answersRainfall has a significant impact on water quality. Studies have shown that the water quality of urban lakes is generally worse during the rainy season compared to the dry season, with a decline in dissolved oxygen concentration and an increase in concentrations of ammonia nitrogen, total suspended solids, and total phosphorus. The characteristics of rainfall, such as antecedent dry days, average rainfall intensity, and rainfall duration, have been found to be critical in affecting the concentrations of total suspended solids, total nitrogen, and total phosphorus in stormwater. Extreme rainfall events have been observed to increase the concentrations of cyanide, lead, iron, manganese, total phosphorus, and turbidity in the Dongjiang River, impacting its water quality. These findings highlight the importance of understanding the relationship between rainfall characteristics and water quality for effective water management and pollutant control.
What factors influence the amount of rainfall in a given area?5 answersThe amount of rainfall in a given area is influenced by various factors. One study found that there is no significant linear relationship between rainfall and temperature, indicating that temperature alone is not sufficient to explain the amount of rainfall. Another study focused on the Beijing area and found that elevation has an evident enhancement effect on rainfall amount, with larger rainfall generally found in higher mountains. Additionally, a systematic analysis of different weather and time-related variables, such as relative humidity, solar radiation, and temperature, showed that these variables have a similar contribution towards rainfall detection. Furthermore, a study on the middle and lower reaches of the Yangtze River Basin found that extreme rainfall is influenced by large-scale climate patterns, such as the Western Pacific Subtropical High Index and the East Asia Monsoon Index. Overall, these studies highlight the complex interplay of various factors, including temperature, elevation, and climate patterns, in determining the amount of rainfall in a given area.