Assessing the impact of agricultural land use changes on water quality

1999 ◽  
Vol 40 (2) ◽  
pp. 1-10 ◽  
Author(s):  
R. Meissner ◽  
J. Seeger ◽  
H. Rupp ◽  
H. Balla
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Agricultural Land ◽  
Land Use Changes ◽  
Agricultural Land Use ◽  
N Loss ◽  
Ground Water Recharge ◽  
Catchment Areas ◽  
One Year ◽  
The Impact

To study and predict environmental impacts of land use changes on water quality we conducted different types of lysimeter experiments. All of them are linked to representative experimental catchment areas in the field. This allows the verification and extrapolation of lysimeter results. The objective of this paper is to discuss a strategy for using and scaling-up of lysimeter results to a field and catchment scale. It will be shown that the N-loss determined with lysimeters falls within the variation of N-balance based model calculations, and also within ground water recharge rates calculated with models commonly used in hydrology. Extrapolation of lysimeter data to a catchment with similar soils provides a reliable basis for estimating the N-leaching caused by a change in agricultural land use. On the basis of the N-loss from the soil and the N-load of the stream, the calculations show that an increase in the proportion of one year rotation fallow from 10 to 25% results in nearly a 10% increase in the N-load of the stream. However, from the point of view of protecting drinking water quality, rotation fallow for one year is not recommended because of the resulting intensified leaching of nitrates.

Water quality in two Icelandic rivers: the influence of impoundment, agriculture, glaciation and permafrost

2014 ◽  
Vol 46 (3) ◽  
pp. 429-445 ◽  
Author(s):  
Nicholas Jones ◽  
Chris Parker
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Agricultural Land ◽  
Anthropogenic Factors ◽  
Agricultural Land Use ◽  
Significant Drop ◽  
Spatial And Temporal Scales ◽  
Permafrost Soils ◽  
The Impact

The water quality of Icelandic rivers is controlled by a number of natural and anthropogenic factors interacting at complex spatial and temporal scales. This article presents the findings of a study into the water quality of two Icelandic rivers; the Blanda and the Skjálfandafljót. The study investigated the impact of three of the factors influencing water quality in these rivers: impoundment for hydro-electric power generation; agricultural land use; and the presence of glacial and periglacial areas. The results indicate that impoundment within a reservoir was responsible for a significant reduction in turbidity and a significant drop in aluminium concentrations as the reservoir acted as a sediment trap and chemical sink. Agricultural land use was found to have no significant effect on the nitrate or phosphate concentrations. Increasing glacial influence was found to be associated with increased turbidity but decreased total dissolved solids. Finally, the presence of permafrost soils in the periglacial highlands of the Blanda was positively associated with aluminium concentrations.

scholarly journals THE IMPACT OF URBAN EXPANSION ON AGRICULTURAL LAND USE CHANGES IN ALIGARH, UTTAR PRADESH, INDIA

2019 ◽  
Vol XLII-3/W6 ◽  
pp. 381-384
Author(s):  
S. Khan ◽  
Keyword(s):  
Land Use ◽  
Agricultural Land ◽  
Driving Forces ◽  
Urban Expansion ◽  
Land Use Changes ◽  
Uttar Pradesh ◽  
Agricultural Land Use ◽  
Land Use Intensity ◽  
Patterns And Processes ◽  
The Impact

<p><strong>Abstract.</strong> India's urbanization has resulted in a significant change in many regions for both agricultural land and agricultural land use. However, there is limited understanding about the relationship between the two primary changes occurring to India's agricultural land – the urban expansion on agricultural land and agricultural land use intensity. Our primary goal here is to examine agricultural land change patterns and processes, and their main driving forces in Aligarh region (Uttar Pradesh) during the time periods from 2011 to 2018. We have conducted a remote sensing and GIS based analysis of change pattern using multi-temporal Landsat imageries for the years 2011 and 2018 by investigating the magnitude of changes in agricultural land use intensity across the district in a geographical perspective. Our study captured gradual decrease in the agricultural land in Aligarh district. The results also show that urban expansion is associated with a decline in agricultural land use intensity. The region experienced agriculture transition, and the urban expansion trend persisted till 2018. In terms of the drivers, we believe that the population and economic factors are most influential in shaping urban centers, while lower incentive and climatic shifts are the key drivers of decrease in agricultural land. Our study highlights the drastic effects of socio-economic and climatic changes on links between urbanization, and agricultural land which implies that urban land expansion is highly likely in future and consequently, will create pressure on the country's food security.</p>

scholarly journals Determining agricultural land use scenarios in a mesoscale Bavarian watershed for modelling future water quality

2012 ◽  
Vol 31 ◽  
pp. 9-14 ◽  
Author(s):  
B. B. Mehdi ◽  
R. Ludwig ◽  
B. Lehner
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Agricultural Land ◽  
Hydrological Model ◽  
Land Use Changes ◽  
Agricultural Land Use ◽  
Quality Of Water ◽  
Land Use Scenarios ◽  
Farm Scale

Abstract. Land use scenarios are of primordial importance when implementing a hydrological model for the purpose of determining the future quality of water in a watershed. This paper provides the background for researching potential agricultural land use changes that may take place in a mesoscale watershed, for water quality research, and describes why studying the farm scale is important. An on-going study in Bavaria examining the local drivers of change in land use is described.

Sign in / Sign up

Export Citation Format

Share Document