Land use effects on sorption of pesticides and their metabolites in sandy soils. I. Fenamiphos and two metabolites, fenamiphos sulfoxide and fenamiphos sulfone, and fenarimol and azinphos methyl

Soil Research ◽  
2003 ◽  
Vol 41 (5) ◽  
pp. 847 ◽  
Author(s):  
D. P. Oliver ◽  
R. S. Kookana ◽  
R. B. Salama
Keyword(s):  
Land Use ◽  
Sorption Isotherms ◽  
Strong Relationship ◽  
Native Vegetation ◽  
Limited Information ◽  
Sorption Behaviour ◽  
Complex Interactions ◽  
Azinphos Methyl ◽  
Kd Values ◽  
Land Use Effects

There is very limited information about the effect of land use on sorption behaviour of organic chemicals. It has been documented that clearing natural vegetation and cropping soil typically decreases the original organic carbon (OC) content of soil. Because OC is one of the major parameters controlling pesticide sorption, the effects of land use on the sorption behaviour of fenamiphos and its 2 main metabolites, fenamiphos sulfone (f. sulfone) and fenamiphos sulfoxide (f. sulfoxide), together with fenarimol and azinphos methyl were investigated. Based on sorption isotherms for a subset of soils, using a range of concentrations (2.5, 5.0, 7.5, and 10 mg/L), the use of a single concentration (2 mg/L) was considered adequate to determine sorption coefficients. Generally the Kd values for fenamiphos were significantly (P�<�0.005) higher than those of its 2 metabolites. The sorption coefficients decreased in the order: fenamiphos >> f. sulfone ≥� f. sulfoxide. As both metabolites can apparently move more easily through soil than fenamiphos, they would pose a greater risk to groundwater contamination. For all compounds, only weak relationships were determined between Kd and pH or %silt + clay. Similarly, the relationship between Kd and %OC was poor, when data from all soils were combined for analysis. However, a strong relationship was obtained between sorption coefficients and %OC for fenamiphos in market garden soils (r2 = 0.76***). This was also the case for azinphos methyl and fenarimol, particularly in soils under native vegetation (r2�=�0.71 and 0.73***, respectively). At a given OC content, the soils under Banksia bush generally showed greater sorption than those under market gardens. This effect became more pronounced with increasing OC content, suggesting that the nature and composition of the OC in soils under native vegetation are likely to be different from that in cultivated soils. Clearly the OC content is not an adequate parameter describing the complex interactions between pesticides and organic matter.

Land use effects on sorption of pesticides and their metabolites in sandy soils. II. Atrazine and two metabolites, deethylatrazine and deisopropylatrazine, and prometryne

Soil Research ◽  
2003 ◽  
Vol 41 (5) ◽  
pp. 861 ◽  
Author(s):  
D. P. Oliver ◽  
R. S. Kookana ◽  
R. B. Salama ◽  
R. Correll
Keyword(s):  
Land Use ◽  
Drinking Water ◽  
Parent Compound ◽  
Sorption Isotherms ◽  
Sandy Soils ◽  
Native Vegetation ◽  
Limited Information ◽  
Sorption Behaviour ◽  
Kd Values ◽  
The Relationship

There is very limited information about the effect of land use on sorption behaviour of organic chemicals. The effects of land use on the sorption behaviour of prometryne, atrazine, and its 2 main metabolites, deethylatrazine (DEA) and deisopropylatrazine (DIA), in sandy soils were studied. This study would provide fate data for these chemicals specifically for Australian soils. Sorption coefficients (Kd) were determined using batch studies and a single solution concentration (2 mg/L for atrazine, DEA, and DIA, and 3 mg/L for prometryne) after initially determining sorption isotherms for a subset of 6 soils for atrazine and prometryne using a range of concentrations. Generally, the Kd values for prometryne were significantly (P < 0.001) greater than for the other 3 compounds. There was no consistent trend in the Kd values for atrazine and the 2 metabolites. This study demonstrated that prometryne was least likely to pose a risk to groundwater contamination but in some cases both atrazine metabolites (DEA and DIA) were less sorbed in the soils than the parent compound. Consequently the metabolites could pose a greater risk to groundwater quality than the parent compound. In the surface soils, significantly (P < 0.05) greater Kd values were determined under native vegetation for DIA, atrazine and prometryne. In the subsurface soils significantly (P < 0.001) greater Kd values were observed under native vegetation for all 4 chemicals. This may be related to differences in the nature and type of OC content of soils under the 2 land uses. There were significant (P < 0.001) positive relationships for the market garden soils between Kd and OC for atrazine, DIA, and DEA (r2 = 0.85, 0.86, and 0.51, respectively). The relationship for prometryne and OC was not significant for all soils. The relationship between Koc and pH was significant (P < 0.001) for prometryne (r2 = 0.70 all soils, r2 = 0.64 native vegetation only). Prometryne Koc values were also fitted to a model to predict changes in sorption of ionic pesticides with changes in pH. The data fitted the predictive model reasonably well at pHw >5, but at more acidic pH values the data deviated from the model predictions suggesting an increase in the cationic form of the pesticide that readily bind to negatively charged clay particles rather than OC. This study demonstrated that land use significantly (P < 0.05) affected the sorption behaviour of DIA, atrazine, and prometryne. It also highlighted the potential risk that pesticide metabolites may pose in areas where groundwater is used as a drinking water supply. Clearly there is a need for the metabolites to be considered when establishing guidelines for drinking water.

scholarly journals Sorption kinetics of isoproturon and assessment of its Ecotoxicity on Lemna minor

2015 ◽  
Vol 1 (1) ◽  
pp. 13-18
Author(s):  
Quazi Forhad Quadir ◽  
Atiqur Rahman
Keyword(s):  
Organic Carbon ◽  
Lemna Minor ◽  
Sorption Isotherms ◽  
Clay Content ◽  
Strong Relationship ◽  
Sorption Kinetics ◽  
Sorption Behaviour ◽  
The Difference ◽  
Soil Clay Content ◽  
Kinetics Of

The study was carried out to investigate the ecotoxicity of Isoproturon on Lemna minor and the interaction of the EC50 value of the chemical with sorption behaviour of the chemical in soil. The sorption isotherms (Kf and KOC) for Isoproturon were determined for three different soils having various organic carbon and clay content. EC50 for Lemna was determined both with and without soil. Both the Freundlich adsorption coefficient (Kf) and normalized sorption coefficient (KOC) values varied with different types of soil. There was moderate correlation between the log Kf and log KOC existed. The regression study revealed a strong relationship between log KOC and organic carbon and between log KOC and soil clay content. There EC50 value for Lemna grown with soil was higher than that grown without soil. However, the difference was statistically insignificant. Greater degree of inconsistency in various data suggests the reiteration of the study.DOI: http://dx.doi.org/10.3329/ralf.v1i1.22347 Res. Agric., Livest. Fish.1(1): 13-18, Dec 2014

Monitoring land use change in the Lake Taupo catchment between 1975, 1990 and 2002 using satellite remote sensing data

2007 ◽  
pp. 17-22
Author(s):  
H. Lilienthal ◽  
A. Brauer ◽  
K. Betteridge ◽  
E. Schnug
Keyword(s):  
Remote Sensing ◽  
Water Quality ◽  
Land Use ◽  
Land Use Change ◽  
Satellite Remote Sensing ◽  
Remote Sensing Data ◽  
Native Vegetation ◽  
Lake Water Quality ◽  
Livestock Farming ◽  
Slow Decline

Conversion of native vegetation into farmed grassland in the Lake Taupo catchment commenced in the late 1950s. The lake's iconic value is being threatened by the slow decline in lake water quality that has become apparent since the 1970s. Keywords: satellite remote sensing, nitrate leaching, land use change, livestock farming, land management

Transportation Economic and Land Use System

1998 ◽  
Vol 1617 (1) ◽  
pp. 84-89 ◽  
Author(s):  
Louis J. Pignataro ◽  
Joseph Wen ◽  
Robert Burchell ◽  
Michael L. Lahr ◽  
Ann Strauss-Wieder
Keyword(s):  
Land Use ◽  
Information System ◽  
Management Tool ◽  
Improvement Program ◽  
Transportation Projects ◽  
Accessible Information ◽  
Surface Transportation ◽  
Land Use System ◽  
Land Use Effects ◽  
Computer Based

The purpose of the Transportation Economic and Land Use System (TELUS) is to convert the transportation improvement program (TIP) into a management tool. Accordingly, the system provides detailed and easily accessible information on transportation projects in the region, as well as their interrelationships and impacts. By doing so, TELUS enables public-sector agencies to meet organizational, Intermodal Surface Transportation Efficiency Act, state, and other mandates more effectively. The objectives are accomplished by providing the computer-based capability to analyze, sort, combine, and track transportation projects in or under consideration for a TIP; assessing the interrelationships among significant transportation projects; estimating the regional economic and land use effects of transportation projects; and presenting project information in an easily understood format, including geographic information system formats.

IMPACTS OF URBAN LAND USE ON CRIME PATTERNS THROUGH GIS APPLICATION

2013 ◽  
Vol 11 (2) ◽  
Author(s):  
Ahmad Nazri Muhamad Ludin ◽  
Norsiah Abd. Aziz ◽  
Nooraini Hj Yusoff ◽  
Wan Juliyana Wan Abd Razak
Keyword(s):  
Land Use ◽  
Drug Abuse ◽  
Land Use Planning ◽  
Urban Areas ◽  
Spatial Relationship ◽  
Police Department ◽  
Strong Relationship ◽  
Urban Land ◽  
Urban Land Use ◽  
Land Use Patterns

Land use planning plays a crucial role in creating a balance between the needs of society, physical development and the ecosystem. However, most often poor planning and displacement of land uses particularly in urban areas contribute to social ills such as drug abuse and criminal activities. This research explains the spatial relationship of drug abuse and other criminal activities on urban land use planning and their implications on the society at large. Spatial statistics was used to show patterns, trends and spatial relationships of crimes and land use planning. Data on crime incidents were obtained from the Royal Malaysia Police Department whilst cases of drug abuse were collected from the National Anti-Drug Agency (AADK). Analysis of the data together with digital land use maps produced by Arnpang Jaya Municipal Council, showed the distribution of crime incidents and drug abuse in the area. Findings of the study also indicated that, there was a strong relationship between petty crimes, drng abuse and land use patterns. These criminal activities tend to concentrate in residential and commercial areas of the study area.

scholarly journals Spatial distribution of the Barbary Partridge (Alectoris barbara) in Sardinia explained by land use and climate

2021 ◽  
Vol 67 (4) ◽  
Author(s):  
Gianpasquale Chiatante ◽  
Marta Giordano ◽  
Anna Vidus Rosin ◽  
Oreste Sacchi ◽  
Alberto Meriggi
Keyword(s):  
Land Use ◽  
Conservation Status ◽  
Distance Sampling ◽  
Strong Relationship ◽  
European Population ◽  
Factors Affecting ◽  
Brood Rearing ◽  
Management Actions ◽  
Negative Effect ◽  
Study Sites

AbstractMore than half of the European population of the Barbary Partridge is in Sardinia; nonetheless, the researches concerning this species are very scarce, and its conservation status is not defined because of a deficiency of data. This research aimed to analyse the habitat selection and the factors affecting the abundance and the density of the Barbary Partridge in Sardinia. We used the data collected over 8 years (between 2004 and 2013) by spring call counts in 67 study sites spread on the whole island. We used GLMM to define the relationships between the environment (topography, land use, climate) both the occurrence and the abundance of the species. Moreover, we estimated population densities by distance sampling. The Barbary Partridge occurred in areas at low altitude with garrigue and pastures, avoiding woodlands and sparsely vegetated areas. We found a strong relationship between the occurrence probability and the climate, in particular, a positive relation with temperature and a negative effect of precipitation, especially in April–May, during brood rearing. Furthermore, dry crops positively affected the abundance of the species. We estimated a density of 14.1 partridges per km2, similar to other known estimates. Our findings are important both because they increase the knowledge concerning this species, which is considered data deficient in Italy, and because they are useful to plan management actions aimed to maintain viable populations if necessary.

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