Runoff
Runoff - Related Videos
13:48
Design and Construction of an Urban Runoff Research Facility
0 Views •
Cited by 6 •
2014
This paper describes the design, construction, and function of a 1,000 m2 facility containing 24 individual 33.6 m2 field plots equipped for measuring total runoff volumes with time and collection of runoff subsamples at selected intervals for quantification of chemical constituents in the runoff water from simulated home lawns.
10:35
A Protocol for Conducting Rainfall Simulation to Study Soil Runoff
0 Views •
Cited by 38 •
2014
A rainfall simulator was used to apply a consistent rate of uniform rainfall to packed soil boxes in a study of the fate and transport of urea, a nonpoint source environmental contaminant. Under uniform soil and rainfall conditions, antecedent soil moisture content exerted strong control over urea loss in surface runoff.
08:49
Vegetated Treatment Systems for Removing Contaminants Associated with Surface Water Toxicity in Agriculture and Urban Runoff
0 Views •
Cited by 4 •
2017
This article summarizes the design attributes and the effectiveness of treatment systems that treat urban stormwater and agriculture irrigation runoff to remove pesticides and other contaminants associated with aquatic toxicity.
10:48
Nutrients in Aquatic Ecosystems
0 Views •
2023
Source: Laboratories of Margaret Workman and Kimberly Frye - Depaul University Nitrogen and phosphorus are essential plant nutrients found in aquatic ecosystems and both are monitored as a part of water quality testing because in excess amounts they can cause significant water quality problems. Nitrogen in water is measured as the common form nitrate (NO3-) that is dissolved in water and readily absorbed by photosynthesizers such as algae. The common form of phosphorus measured is phosphate...
06:16
Determination of Moisture Content in Soil
0 Views •
2023
Source: Laboratories of Dr. Ian Pepper and Dr. Charles Gerba - The University of Arizona Demonstrating Author: Bradley Schmitz Soils normally contain a finite amount of water, which can be expressed as the “soil moisture content.” This moisture exists within the pore spaces in between soil aggregates (inter-aggregate pore space) and within soil aggregates (intra-aggregate pore space) (Figure 1). Normally this pore space is occupied by air and/or water. If all the pores are occupied by air, the...
FAQs
These conditions affect both the amount of runoff and what it carries. Soil saturation limits additional storage, while slope influences downhill movement. Vegetation and impervious surfaces alter how water interacts with the land before entering aquatic systems. Consequently, two areas receiving similar precipitation or irrigation may deliver different volumes and mixtures of nutrients, pesticides, organic matter, sediments, and microorganisms.
Runoff connects terrestrial sources with streams, lakes, and coastal waters by moving materials from land into receiving waters. Dissolved nutrients and pesticides can travel in the water, while sediments, organic matter, and microorganisms may also be carried along. This transport changes the chemical and biological conditions experienced by aquatic organisms and helps explain pollutant exposure and habitat change.
Nutrients carried from land can enter aquatic ecosystems through runoff, where they may contribute to algal blooms. Runoff also transports sediments, organic matter, pesticides, and microorganisms, creating several pathways for environmental change. Examining these inputs helps biologists connect land conditions with altered habitats, pollutant exposure, and effects on aquatic biodiversity.
Assessments can show how land-based water movement affects water quality and biodiversity across connected terrestrial and aquatic environments. Researchers can consider runoff volume and composition alongside nutrient transport, pollutant exposure, habitat change, and algal blooms. This information supports interpretation of ecosystem responses and helps identify consequences associated with agriculture, development, or other land-use changes.
Researchers examine how changes in land use alter runoff and the materials delivered to aquatic systems. Comparing runoff-related conditions with water quality, habitat status, and biodiversity can reveal links between terrestrial modification and ecological response. This approach is relevant to watershed research because it connects land-surface changes with nutrient cycling, pollutant movement, and aquatic ecosystem condition.
Understanding runoff helps identify how precipitation or irrigation can transfer nutrients, pesticides, sediments, organic matter, and microorganisms into nearby waters. That knowledge supports management intended to protect watersheds, reduce harmful effects on aquatic ecosystems, and promote sustainable agriculture. It also provides a basis for assessing whether land-use practices are associated with changes in water quality or biodiversity.