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Watershed management

About: Watershed management is a(n) research topic. Over the lifetime, 6773 publication(s) have been published within this topic receiving 111023 citation(s).

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Open accessBook
01 Jun 1993-
Abstract: Using the Columbia River Basin in the Pacific Northwest as a case study, Kai Lee describes the concept and practice of "adaptive management," as he examines the successes and failures of past and present management experiences. Throughout the book, the author delves deeply into the theoretical framework behind the real-world experience, exploring how theories of science, politics, and cognitive psychology can be integrated into environmental management plans to increase their effectiveness.

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1,434 Citations


Journal ArticleDOI: 10.2134/JEQ1994.00472425002300030006X
Abstract: The accelerated eutrophication of most freshwaters is limited by P inputs. Nonpoint sources of P in agricultural runoff now contribute a greater portion of freshwater inputs, due to easier identification and recent control of point sources. Although P management is an integral part of profitable agrisystems, continued inputs of fertilizer and manure P in excess of crop requirements have led to a build-up of soil P levels, which are of environmental rather than agronomic concern, particularly in areas of intensive crop and livestock production. Thus, the main issues facing the establishment of economically and environmentally sound P management systems are the identification of soil P levels that are of environmental concern; targeting specific controls for different water quality objectives within watersheds; and balancing economic with environmental values. In developing effective options, we have brought together agricultural and limnological expertise to prioritize watershed management practices and remedial strategies to mitigate nonpoint-source impacts of agricultural P. Options include runoff and erosion control and P-source management, based on eutrophic rather than agronomic considerations. Current soil test P methods may screen soils on which the aquatic bioavailability of P should be estimated. Landowner options to more efficiently utilize manure P include basing application rates on soil vulnerability to P loss in runoff, manure analysis, and programs encouraging manure movement to a greater hectareage. Targeting source areas may be achieved by use of indices to rank soil vulnerability to P loss in runoff and lake sensitivity to P inputs.

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Topics: Nonpoint source pollution (56%), Erosion control (54%), Surface runoff (54%) ...read more

1,384 Citations


Journal ArticleDOI: 10.1016/J.JHYDROL.2006.09.014
Karim C. Abbaspour1, Jing Yang1, Ivan Maximov1, Rosi Siber1  +4 moreInstitutions (2)
Abstract: Summary In a national effort, since 1972, the Swiss Government started the “National Long-term Monitoring of Swiss Rivers” (NADUF) program aimed at evaluating the chemical and physical states of major rivers leaving Swiss political boundaries. The established monitoring network of 19 sampling stations included locations on all major rivers of Switzerland. This study complements the monitoring program and aims to model one of the program’s catchments – Thur River basin (area 1700 km 2 ), which is located in the north-east of Switzerland and is a direct tributary to the Rhine. The program SWAT (Soil and Water Assessment Tool) was used to simulate all related processes affecting water quantity, sediment, and nutrient loads in the catchment. The main objectives were to test the performance of SWAT and the feasibility of using this model as a simulator of flow and transport processes at a watershed scale. Model calibration and uncertainty analysis were performed with SUFI-2 (Sequential Uncertainty FItting Ver. 2), which was interfaced with SWAT using the generic iSWAT program. Two measures were used to assess the goodness of calibration: (1) the percentage of data bracketed by the 95% prediction uncertainty calculated at the 2.5 and 97.5 percentiles of the cumulative distribution of the simulated variables, and (2) the d-factor , which is the ratio of the average distance between the above percentiles and the standard deviation of the corresponding measured variable. These statistics showed excellent results for discharge and nitrate and quite good results for sediment and total phosphorous. We concluded that: in watersheds similar to Thur – with good data quality and availability and relatively small model uncertainty – it is feasible to use SWAT as a flow and transport simulator. This is a precursor for watershed management studies.

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Topics: SWAT model (65%), Swat-CUP (63%), Monitoring program (57%) ...read more

1,276 Citations


Journal ArticleDOI: 10.1006/JEMA.2002.0593
Susanna T.Y. Tong1, Wenli Chen1Institutions (1)
Abstract: It is widely known that watershed hydrology is dependent on many factors, including land use, climate, and soil conditions. But the relative impacts of different types of land use on the surface water are yet to be ascertained and quantified. This research attempted to use a comprehensive approach to examine the hydrologic effects of land use at both a regional and a local scale. Statistical and spatial analyses were employed to examine the statistical and spatial relationships of land use and the flow and water quality in receiving waters on a regional scale in the State of Ohio. Besides, a widely accepted watershed-based water quality assessment tool, the Better Assessment Science Integrating Point and Nonpoint Sources (BASINS), was adopted to model the plausible effects of land use on water quality in a local watershed in the East Fork Little Miami River Basin. The results from the statistical analyses revealed that there was a significant relationship between land use and in-stream water quality, especially for nitrogen, phosphorus and Fecal coliform. The geographic information systems (GIS) spatial analyses identified the watersheds that have high levels of contaminants and percentages of agricultural and urban lands. Furthermore, the hydrologic and water quality modeling showed that agricultural and impervious urban lands produced a much higher level of nitrogen and phosphorus than other land surfaces. From this research, it seems that the approach adopted in this study is comprehensive, covering both the regional and local scales. It also reveals that BASINS is a very useful and reliable tool, capable of characterizing the flow and water quality conditions for the study area under different watershed scales. With little modification, these models should be able to adapt to other watersheds or to simulate other contaminants. They also can be used to study the plausible impacts of global environmental change. In addition, the information on the hydrologic effects of land use is very useful. It can provide guidelines not only for resource managers in restoring our aquatic ecosystems, but also for local planners in devising viable and ecologically-sound watershed development plans, as well as for policy makers in evaluating alternate land management decisions.

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Topics: Watershed management (65%), Land management (64%), Low-impact development (62%) ...read more

855 Citations


Journal ArticleDOI: 10.1016/S0921-8009(00)00165-8
Abstract: Wetlands have value because their functions have proved to be useful to humans The unit value for some wetlands also increases with human development (agriculture and urban) because of increased use and/or increased scarcity Yet, paradoxically, its functions can easily be overwhelmed in areas of heavy human development, thus lessening those values Thus wetlands appear to work best in the landscape as spatially distributed systems Also, the value is partially dependent on where they are found in the landscape, eg, the degree to which a wetland is open to hydrologic and biological fluxes with other systems, including urban and agricultural landscapes A paradox of assigning values to wetlands and other ecosystems is that it can argue for the replacement of one system with another if a landscape view is not taken Estimates of percent of landscape for various functions, eg water quality or flood control, are presented It is suggested that a range of 3–7% of temperate-zone watersheds should be in wetlands to provide adequate flood control and water quality values for the landscape

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Topics: Landscape ecology (57%), Wetland (54%), Watershed management (51%)

826 Citations


Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20225
2021203
2020178
2019247
2018243
2017228

Top Attributes

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Topic's top 5 most impactful authors

Suhas P. Wani

49 papers, 1.4K citations

Peter F. Ffolliott

28 papers, 243 citations

Indrajeet Chaubey

18 papers, 1.2K citations

Timothy O. Randhir

17 papers, 456 citations

Bernard A. Engel

14 papers, 211 citations

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