Hydrology Unit Hydrograph Quiz

<p>33 cu.meter/second (A)</p> Signup and view all the answers

<p>15 cu.meter/second (D)</p> Signup and view all the answers

<p>Group D (A)</p> Signup and view all the answers

<p>Amount of precipitation (C)</p> Signup and view all the answers

<p>0.15 – 0.30 in/hr (D)</p> Signup and view all the answers

<p>Managing agricultural land to reduce runoff and improve infiltration (D)</p> Signup and view all the answers

<p>Presence of impervious surfaces like roads (B)</p> Signup and view all the answers

<p>Flood response of the basin to rainfall (D)</p> Signup and view all the answers

<p>To analyze flood characteristics independent of rainfall (B)</p> Signup and view all the answers

<p>By subtracting base flow from the observed hydrograph (C)</p> Signup and view all the answers

<p>The portion of flow not attributed to direct runoff (B)</p> Signup and view all the answers

<p>The excess runoff per unit of effective rainfall (B)</p> Signup and view all the answers

<p>24 hours (C)</p> Signup and view all the answers

<p>They gradually decrease (D)</p> Signup and view all the answers

<p>To derive the unit hydrograph (A)</p> Signup and view all the answers

<p>To represent the period of increasing discharge due to rainfall infiltration. (B)</p> Signup and view all the answers

<p>It marks the highest rate of flow during a rainfall event, often used for design purposes. (A)</p> Signup and view all the answers

<p>The gradual decrease in discharge after a rainfall event. (B)</p> Signup and view all the answers

<p>A graph showing the rate of flow (discharge) versus time at a specific point in a river. (A)</p> Signup and view all the answers

<p>The rate of flow (discharge) of water over time at a specific point. (C)</p> Signup and view all the answers

<p>Precipitation Intensity (C)</p> Signup and view all the answers

<p>Differentiating between surface runoff and baseflow in the hydrograph. (C)</p> Signup and view all the answers

<p>Rational Method and SCS Curve Method (B)</p> Signup and view all the answers

<p>A dimensionless number reflecting soil and cover conditions (A)</p> Signup and view all the answers

<p>High computational demand (C)</p> Signup and view all the answers

<p>Soil temperature (B)</p> Signup and view all the answers

<p>Potential maximum retention after runoff begins (D)</p> Signup and view all the answers

<p>More than 75% ground cover with light grazing (C)</p> Signup and view all the answers

<p>0 to 100 (D)</p> Signup and view all the answers

<p>There are four distinct hydrologic soil groups (B)</p> Signup and view all the answers

<p>Surfaces that do not allow water to penetrate (C)</p> Signup and view all the answers

<p>Effective Rainfall (D)</p> Signup and view all the answers

<p>The 'meter / second' values represent the peak flow rates in the DRH curves. (C)</p> Signup and view all the answers

<p>Cubic meters per second (C)</p> Signup and view all the answers

<p>600 meters/second (A)</p> Signup and view all the answers

<p>The flow rate increases proportionally to the ER. (D)</p> Signup and view all the answers

<p>12-15 hours (D)</p> Signup and view all the answers

<p>All of the above (D)</p> Signup and view all the answers

<p>To estimate the peak flow rate for a specific ER event. (C)</p> Signup and view all the answers

The study of water movement and distribution on Earth.

The continuous movement of water through evaporation, condensation, and precipitation.

A graph showing the flow rate of water over time at a specific location.

The volume of water flowing per unit time at a specific point.

The part of the hydrograph that shows increasing discharge after a rain event.

The maximum rate of flow in a hydrograph.

The portion of the hydrograph after peak discharge where flow decreases.

Techniques like the rational method and SCS Curve Method to predict runoff.

A hydrograph representing the response of a watershed to a unit of rainfall excess.

A hydrograph that shows direct runoff from excess rainfall, excluding base flow.

The sustained flow in a stream or river, resulting from groundwater seepage.

Rainfall amount that exceeds the initial abstraction and contributes to runoff.

A unit of measurement for flow rate representing cubic meters of water flowing per second.

Graph showing water flow from a basin over time following rainfall.

The portion of the hydrograph representing direct runoff after subtracting base flow.

Values on the hydrograph that indicate flow rates at specific times.

Unit hydrograph derived from direct runoff over a 6-hour period.

Calculating direct runoff by subtracting base flow from the observed hydrograph.

A unit of measurement for velocity, indicating distance traveled in meters per second.

The amount of rainfall that contributes to surface runoff after absorption and evaporation losses.

A technique used to estimate peak surface runoff for drainage structure design.

The maximum rate at which water flows over land after rainfall.

Built systems designed to manage water runoff, including sewers and ponds.

A pond designed to temporarily hold stormwater runoff and release it slowly.

Water that flows over the land surface after precipitation.

The process of creating systems to manage stormwater effectively, ensuring safety and functionality.

A method to estimate runoff using rainfall and soil retention data.

The amount of water that runs off the surface after rainfall.

The depth of rain that falls over a period, also in inches.

The maximum amount of water a soil can retain after runoff starts.

A dimensionless number that reflects soil and land cover conditions for runoff.

Classification of soils based on their runoff-producing properties.

Reliable, efficient, and uses readily available input data.

A combined runoff curve number for different land cover types.

Lowest runoff potential greater than 0.30 in/hr.

Moderately low runoff potential between 0.15 – 0.30 in/hr.

Moderately high runoff potential between 0.05 – 0.15 in/hr.

Highest runoff potential between 0 – 0.05 in/hr.

Factors affecting infiltration and runoff include vegetation, cover, and roughness.