Impact of land use patterns and agricultural practices on water quality in the Calapooia River Basin of western Oregon

2012 ◽  
Vol 67 (3) ◽  
pp. 183-201 ◽  
Author(s):  
G. W. Mueller-Warrant ◽  
S. M. Griffith ◽  
G. W. Whittaker ◽  
G. M. Banowetz ◽  
W. F. Pfender ◽  
...  
Keyword(s):  
Water Quality ◽  
Land Use ◽  
River Basin ◽  
Agricultural Practices ◽  
Land Use Patterns ◽  
Use Patterns

scholarly journals The Impacts of Land Use Patterns on Water Quality in a Trans-Boundary River Basin in Northeast China Based on Eco-Functional Regionalization

2018 ◽  
Vol 15 (9) ◽  
pp. 1872 ◽  
Author(s):  
Peixuan Cheng ◽  
Fansheng Meng ◽  
Yeyao Wang ◽  
Lingsong Zhang ◽  
Qi Yang ◽  
...  
Keyword(s):  
Water Quality ◽  
Land Use ◽  
River Basin ◽  
Natural Environment ◽  
Flow Region ◽  
High Flow ◽  
Land Use Patterns ◽  
Use Patterns ◽  
The Impact ◽  
Degraded Water Quality

The relationships between land use patterns and water quality in trans-boundary watersheds remain elusive due to the heterogeneous natural environment. We assess the impact of land use patterns on water quality at different eco-functional regions in the Songhua River basin during two hydrological seasons in 2016. The partial least square regression indicated that agricultural activities associated with most water quality pollutants in the region with a relative higher runoff depth and lower altitude. Intensive grazing had negative impacts on water quality in plain areas with low runoff depth. Forest was related negatively with degraded water quality in mountainous high flow region. Patch density and edge density had major impacts on water quality contaminants especially in mountainous high flow region; Contagion was related with non-point source pollutants in mountainous normal flow region; landscape shape index was an effective indicator for anions in some eco-regions in high flow season; Shannon’s diversity index contributed to degraded water quality in each eco-region, indicating the variation of landscape heterogeneity influenced water quality regardless of natural environment. The results provide a regional based approach of identifying the impact of land use patterns on water quality in order to improve water pollution control and land use management.

Relationships between land use patterns and water quality in the Taizi River basin, China

2014 ◽  
Vol 41 ◽  
pp. 187-197 ◽  
Author(s):  
Hongmei Bu ◽  
Wei Meng ◽  
Yuan Zhang ◽  
Jun Wan
Keyword(s):  
Water Quality ◽  
Land Use ◽  
River Basin ◽  
Land Use Patterns ◽  
Use Patterns ◽  
Taizi River Basin ◽  
Taizi River

A square grid model for assessing the effect of alternative land uses on water quality

1976 ◽  
Vol 3 (2) ◽  
pp. 209-218 ◽  
Author(s):  
Thomas W. Constable ◽  
Nicholas Kouwen ◽  
Shully I. Solomon
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Water Quantity ◽  
Preliminary Design ◽  
Land Use Patterns ◽  
Time Intervals ◽  
Square Grid ◽  
Use Patterns ◽  
Grid Technique ◽  
Artificial Ponds

A mathematical model has been developed which can aid in assessing the effect of the modification of land use patterns on the water quantity and water quality regime of a watershed. The basin under study is divided into a number of elements using a square grid technique. The hydrologic and water quality components are evaluated at each element in the basin at successive time intervals, and flows are routed through the elements by use of a streamflow network system. The model can be used to assist in evaluating the effects of alternative land use configurations in a watershed, such as urbanization, the removal or growth of forests, the construction of dams, etc., on water quantity and water quality. It can also be used in the preliminary design of an urbanized area to estimate the size of storm sewers, artificial ponds, etc.

Preliminary identification of watershed management strategies for the Houjing river in Taiwan

2010 ◽  
Vol 62 (7) ◽  
pp. 1667-1675 ◽  
Author(s):  
C. E. Lin ◽  
C. M. Kao ◽  
C. J. Jou ◽  
Y. C. Lai ◽  
C. Y. Wu ◽  
...  
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Point Source ◽  
Watershed Management ◽  
Carrying Capacity ◽  
Pollution Control ◽  
Point Source Pollution ◽  
Land Use Patterns ◽  
River Watershed ◽  
Use Patterns

The Houjing River watershed is one of the three major river watersheds in the Kaohsiung City, Taiwan. Based on the recent water quality analysis, the Houjing River is heavily polluted. Both point and non-point source (NPS) pollutants are the major causes of the poor water quality in the Houjing River. Investigation results demonstrate that the main point pollution sources included municipal, agricultural, and industrial wastewaters. In this study, land use identification in the Houjing River watershed was performed by integrating the skills of geographic information system (GIS) and global positioning system (GPS). Results show that the major land-use patterns in the upper catchment of the Houjing River watershed were farmlands, and land-use patterns in the mid to lower catchment were residential and industrial areas. An integrated watershed management model (IWMM) and Enhanced Stream Water Quality Model (QUAL2K) were applied for the hydrology and water quality modeling, watershed management, and carrying capacity calculation. Modeling results show that the calculated NH3-N carrying capacity of the Houjing River was only 31 kg/day. Thus, more than 10,518 kg/day of NH3-N needs to be reduced to meet the proposed water quality standard (0.3 mg/L). To improve the river water quality, the following remedial strategies have been developed to minimize the impacts of NPS and point source pollution on the river water quality: (1) application of BMPs [e.g. source (fertilizer) reduction, construction of grassy buffer zone, and land use management] for NPS pollution control; (2) application of river management scenarios (e.g. construction of the intercepting and sewer systems) for point source pollution control; (3) institutional control (enforcement of the industrial wastewater discharge standards), and (4) application of on-site wastewater treatment systems for the polishment of treated wastewater for water reuse.

Site 48UT375: Late Paleoindian Period Subsistence and Land Use Patterns in the Green River Basin, Wyoming

2003 ◽  
Vol 48 (186) ◽  
pp. 133-149 ◽  
Author(s):  
Craig S. Smith ◽  
Thomas P. Reust ◽  
Russell D. Richard
Keyword(s):  
Land Use ◽  
River Basin ◽  
Land Use Patterns ◽  
Green River Basin ◽  
Green River ◽  
Use Patterns ◽  
Late Paleoindian

The influence of land use patterns on water quality at multiple spatial scales in a river system

2013 ◽  
Vol 28 (20) ◽  
pp. 5259-5272 ◽  
Author(s):  
Guoqiang Wang ◽  
Yinglan A ◽  
Zongxue Xu ◽  
Shurong Zhang
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Spatial Scales ◽  
River System ◽  
Land Use Patterns ◽  
Use Patterns ◽  
Multiple Spatial Scales

scholarly journals Anthropic Processes and Land-Use Change During 33 Years in Roraima, Northern Amazonia

2018 ◽  
Vol 10 (7) ◽  
pp. 426 ◽  
Author(s):  
Marcelle A. Urquiza ◽  
Valdinar F. Melo ◽  
Márcio R. Francelino ◽  
Carlos E. G. R. Schaefer ◽  
Eliana De Souza ◽  
...  
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Human Impacts ◽  
Agricultural Practices ◽  
Forest Loss ◽  
Land Use Patterns ◽  
Use Patterns ◽  
Agricultural Colonization ◽  
Forest Resilience ◽  
Family Based

The Amazon region has experienced a rapid rate of deforestation and land use change as a result of establishment of agricultural settlements, resulting from public policies designed to promote rural development. We analyzed land use patterns and changes in the central region of Roraima, northern Brazil, testing the hypothesis that the anthropic pressure based on the conversion of natural vegetation (forest ecotone zone and open areas of savanna and campinaranas) on agriculture and pasture, has led to the decline of forest resilience, and has not promoted development in lands converted in agricultural colonization projects, a process exacerbated by practices of burning. Satellite images from between 1984 to 2017, with field-collected data and geoprocessing techniques, allowed interpretation and analysis of seven land-use classes. Agriculturally-based human impacts were greatest in forest areas, with forest loss rates being 6.4 times greater than regeneration rates. The 39.3% reduction in natural non-forest vegetation types exceeded that of forest loss (23.8%). Repeated fires resulted in a 627.1% increase in forest fragmentation in areas heavily impacted by fire. Our study revealed that, over 33 years, deforestation and transitions of land to non-conservation uses did not lead to a system with highly productive agricultural practices, but to extensive impoverished, and degraded subsistence. The main reason was the basic unsuitability of the region´s extremely acidic/dystrophic soils on which settlements have been founded, and the predominance of low-tech, family-based, agriculture and the absence of the required technology for attaining better results.

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