Related Experiment Video
Updated: Oct 27, 2025
04:35
Author Spotlight: Simulation and Analysis of the Temperature Rise of Ring Main Unit Equipment
Published on: July 5, 2024
2.1K
Comparative Study on Temperature Response of Hydropower Development in the Dry-Hot Valley
D C Wang1,2, X Zhang1, Y Huang3,4
1School of Geology and Geomatics Tianjin Chengjian University Tianjin China.
Geohealth
|July 23, 2021
Summary
Hydropower projects significantly alter river and surrounding temperatures, with effects varying by season and region. Dry-hot valleys experience warming downstream and near reservoirs, while other valleys show mixed temperature changes.
Area of Science:
- Environmental Science
- Hydrology
- Climate Change
Background:
- Dry-hot valleys possess unique hydrothermal conditions.
- Large-scale hydropower projects can induce significant temperature alterations.
- Understanding these impacts is crucial for regional environmental management.
Purpose of the Study:
- To analyze temperature changes induced by hydropower stations in dry-hot and non-dry-hot valleys.
- To quantify the influence of reservoirs on downstream river and surrounding area temperatures.
- To compare temperature regulation effects across different climatic zones and seasons.
Main Methods:
- Analysis of temperature data from four hydropower stations.
- Calculation of relative temperatures for downstream rivers and reservoir surroundings.
- Application of two indices: downstream river temperature change and reservoir effect change intensity.
Main Results:
- Temperature regulation effects were stronger in downstream rivers during the wet season and in surrounding areas during the dry season.
- Downstream warming was observed in dry-hot and wet-hot valleys year-round; cold-dry valleys showed cooling in the dry season and warming in the wet season.
- Hydropower stations generally impacted entire downstream regions, except for one specific case.
- Reservoirs caused temperature increases in dry-hot valley surroundings and decreases in non-dry-hot valley surroundings.
Conclusions:
- Hydropower development leads to distinct seasonal and regional temperature modifications.
- The impact on surrounding areas differs significantly between dry-hot and non-dry-hot valleys.
- Seasonal variations in temperature regulation by hydropower are evident in both downstream and surrounding areas.
Keywords:
comparative studydownstream river temperature changedry‐hot valleyrelative temperaturereservoir effect change intensityMore Related Videos
Related Concept Videos
02:41Responses to Drought and Flooding
11.3K
Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.
11.3K
02:45Responses to Heat and Cold Stress
14.1K
Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
14.1K
01:27Energy Line and Hydraulic Gradient Line
1.5K
Based on Bernoulli's equation, the energy line (EL) and hydraulic grade line (HGL) provide graphical representations of energy distribution in a fluid flow system. For steady, incompressible, inviscid flows, Bernoulli's equation is expressed as:
1.5K
02:46Quantifying Heat
59.2K
Thermal Energy Microscopically, thermal energy is the kinetic energy associated with the random motion of atoms and molecules. Temperature is a quantitative measure of “hot” or “cold”, which depends on the amount of thermal energy. When the atoms and molecules in an object are moving or vibrating quickly, they have a higher average kinetic energy (KE) (or higher thermal energy), and the object is perceived as “hot”, or it is described as being at a...
59.2K
02:11Effects of Temperature on Free Energy
26.5K
The spontaneity of a process depends upon the temperature of the system. Phase transitions, for example, will proceed spontaneously in one direction or the other depending upon the temperature of the substance in question. Likewise, some chemical reactions can also exhibit temperature-dependent spontaneities. To illustrate this concept, the equation relating free energy change to the enthalpy and entropy changes for the process is considered:
26.5K
02:44Heating and Cooling Curves
24.9K
When a substance—isolated from its environment—is subjected to heat changes, corresponding changes in temperature and phase of the substance is observed; this is graphically represented by heating and cooling curves.
For instance, the addition of heat raises the temperature of a solid; the amount of heat absorbed depends on the heat capacity of the solid (q = mcsolidΔT). According to thermochemistry, the relation between the amount of heat absorbed or released by a substance, q, and its...
For instance, the addition of heat raises the temperature of a solid; the amount of heat absorbed depends on the heat capacity of the solid (q = mcsolidΔT). According to thermochemistry, the relation between the amount of heat absorbed or released by a substance, q, and its...
24.9K