scholarly journals Examination of Differences in Water Quality and Quantity by Reservoir Catchment with a Different Land-Use Type in the Republic of Mauritius

2018 ◽  
Vol 10 (6) ◽  
pp. 2080
Author(s):  
Fatema Nabybaccus ◽  
Don Lee ◽  
Yohan Lee ◽  
Jung Seo
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Land Use Type ◽  
The Republic ◽  
Water Quality And Quantity

Post-validation of SWAT model in a coastal watershed for predicting land use/cover change impacts

2015 ◽  
Vol 46 (6) ◽  
pp. 837-853 ◽  
Author(s):  
Harsh Vardhan Singh ◽  
Latif Kalin ◽  
Andrew Morrison ◽  
Puneet Srivastava ◽  
Graeme Lockaby ◽  
...  
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Suspended Solids ◽  
Assessment Tool ◽  
Organic Phosphorus ◽  
Swat Model ◽  
Coastal Watershed ◽  
Water Quality And Quantity ◽  
Water Assessment ◽  
Total P

Watershed models are typically calibrated and validated with the same land use and land cover (LULC) dataset and later used in assessing impacts of changing LULC, such as urbanization, on hydrology and/or water quality. However, their performance in predicting water quality/quantity in response to changing LULC is rarely assessed. The main objective of this paper was to explore the performance of the soil and water assessment tool (SWAT) in predicting water quality and quantity in response to changing LULC in a coastal watershed in Alabama, USA. Using the 1992 LULC as the input, the model was calibrated and validated for flow for the period 1990–1998, and for total suspended solids (TSS), nitrate (NO3−), and organic phosphorus for the period 1994–1998 at several sites within the watershed. The model was then driven with the 2008 LULC data and its performance in predicting flow and TSS, NO3−, and total-P loads during the period 2008–2010 was evaluated (post-validation). SWAT showed good performance in predicting changes in flow and water quality during the post-validation period. The study also highlighted the importance of using the most up-to-date LULC data for effectively predicting the impacts of LULC changes on water quality.

Global upstream protected land

2017 ◽  
Author(s):  
Chloé Meyer
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Surface Water ◽  
Water Supply ◽  
Freshwater Ecosystems ◽  
Total Water ◽  
Historic Sites ◽  
Marine Areas ◽  
Water Quality And Quantity ◽  
Downstream Impacts

Upstream protected land measures the percentage of total water supply that originates from protected ecosystems. Modified land use can affect the health of freshwater ecosystems and have severe downstream impacts on both water quality and quantity. IUCN category V protected lands, as well as a large number of unclassi ed proposed lands, breeding centers, municipal parks, cultural and historic sites, and exclusively marine areas, are excluded. Biodiversity Surface water

Linking land-use type and stream water quality using spatial data of fecal indicator bacteria and heavy metals in the Yeongsan river basin

2010 ◽  
Vol 44 (14) ◽  
pp. 4143-4157 ◽  
Author(s):  
Joo-Hyon Kang ◽  
Seung Won Lee ◽  
Kyung Hwa Cho ◽  
Seo Jin Ki ◽  
Sung Min Cha ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Water Quality ◽  
Land Use ◽  
River Basin ◽  
Spatial Data ◽  
Stream Water ◽  
Indicator Bacteria ◽  
Land Use Type ◽  
Stream Water Quality ◽  
Fecal Indicator

Characterization of surface runoff in urban areas

2002 ◽  
Vol 45 (9) ◽  
pp. 249-254 ◽  
Author(s):  
J.S. Choe ◽  
K.W. Bang ◽  
J.H. Lee
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Surface Runoff ◽  
Urban Areas ◽  
Land Use Type ◽  
Industrial Zone ◽  
Physical Treatment ◽  
Industry Type ◽  
Hexane Extracts ◽  
Industrial Zones

Water quality measurements of surface runoff have been carried out in selected residential and industrial zones in urban areas, in which yearly mean precipitation is 1,225 mm. The concentrations of constituents in the surface runoff were measured at sampling sites categorized by land use type in the residential zone, and by industry type in the industrial zone. The water quality constituents of BOD5, COD, SS, NO3-N, TKN, PO4-P, TP, n-Hexane extracts, Cr, Cu, Pb and Fe were analyzed. The event mean concentrations (EMCs) of COD, SS, TKN and TP in the residential zone were 313 mg/L, 279 mg/L, 8.45 mg/L, 1.98 mg/L, and those in the industrial zone were 80 mg/L, 106 mg/L, 5.07 mg/L, and 1.93 mg/L, respectively. Cumulative load curves were created to analyze the first-flushing effect of each pollutant related to the pollutant, the rainfall event, and the land use type. No general relationship between the cumulative load and runoff has been established. The degree of first-flushing effect by constituents was in the following order; TKN>COD>SS>HEM>TP>PO4-P. The correlations between SS and other constituents were analyzed to evaluate the efficiency of the physical treatment process to control the surface runoff in urban areas. Based on the correlation of constituents with SS, high treatment efficiency of SS, heavy metals, organic matter, and TP was expected. The unit pollutant loading rates of COD, SS, TKN, TP, Cr and Pb in the residential zone were 2,392, 2,130, 64.6, 15.1, 0.31, and 1.83 kg/ha/yr, and those in the industrial zone were 612, 812, 38.7, 14.8, 0.51 and 0.82 kg/ha/yr, respectively.

scholarly journals ASSESSING THE EFFECTS OF LAND USE CONVERSION ON RUNOFF AND NUTRIENT LOAD

2018 ◽  
Vol 30 (3) ◽  
Author(s):  
Khairul Anuar Mohamad ◽  
Noorbaharim Hashim ◽  
Ilya Khairanis Othman ◽  
Mohd Syazwan Faisal Mohd
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Agricultural Land ◽  
Fold Increase ◽  
Base Flow ◽  
Point Sources ◽  
Plant Management ◽  
Water Quality And Quantity ◽  
Effects Of Land Use

An agricultural land with intensive cultivation, large catchments with extended rivers and agricultural population of high-density are the primary reasons for higher pollutant loads in freshwater. However, there are problems in pursuing nutrient losses since several parameters, such as variability in soils and climate are associated with heavy rainfall, especially in tropic regions; plant management, limited resources, and insufficient technical support are not consistent in every crop management. Changes in agricultural practices and unmonitored point sources discharge from watershed, have led to algal bloom in abundance, and thus generated eutrophication at the downstream. The complex watershed processes and forecasting the effects of land use change on water quality can be determined by using tools of watershed models. The Hydrological Simulation Programme-FORTRAN (HSPF) uses lumped parameters, continuous model to predict the long-term evaluation, and deterministic for simulating the water quality and quantity process that occur at the watershed. Pervious land segments (PERLND), impervious land segments (IMPLND), and channel reach (RCHRES) modules were used to determine the general water quality and quantity on Johor watershed. Based on calibration and validation, the HSPF model was capable of simulating different runoff seasons. An increment of 60% in agricultural land had increased the annual mean total phosphorus (TP) load and total nitrogen (TN) load by 3.82% and 5.34%, respectively. A 2-fold increase in agricultural land would result in an approximately 2-fold increase in the quantity of annual TN and TP loads. Between TN and TP loads, TP load has potentially increased more than TN load during the dry, wet, and base-flow years. Upon the long-term of water quality and quantity simulation, this study provides essential knowledge for a method-based runoff and nutrient management plan for the Johor watershed.

scholarly journals Impacts of land use at multiple buffer scales on seasonal water quality in a reticular river network area

PLoS ONE ◽  
2021 ◽  
Vol 16 (1) ◽  
pp. e0244606
Author(s):  
Zhimin Zhang ◽  
Fei Zhang ◽  
Jinglong Du ◽  
Dechao Chen ◽  
Weiwei Zhang
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Water Resource Management ◽  
Environmental Planning ◽  
Water Area ◽  
River Network ◽  
Land Use Type ◽  
Wet Season ◽  
Network Area ◽  
Regional Water

The assessment and prediction of regional water quality are fundamental inputs to environmental planning and watershed ecological management. This paper explored spatiotemporal changes in the correlation of water quality parameters (WQPs) and land-use types (LUTs) in a reticular river network area. Water samples of 44 sampling sites were collected every quarter from 2016 to 2018 and evaluated for dissolved oxygen (DO), total phosphorus (TP), ammonia nitrogen (NH3-N), and permanganate index (CODMn). A redundancy analysis (RDA) and stepwise multiple linear regression (SMLR) were applied to analyze the land-use type impacts on seasonal WQPs at five buffer scales (100, 200, 500, 800, and 1000 m). The Kruskal–Wallis test results revealed significant seasonal differences in NH3-N, TP, CODMn, and DO. The area percentages of farmland, water area and built-up land in the study area were 38.96%, 22.75% and16.20%, respectively, for a combined total area percentage of nearly 80%. Our study showed that orchard land had an especially favorable influence on WQPs. Land-use type impacts on WQPs were more significant during the dry season than the wet season. The total variation explained by LUTs regarding WQPs at the 1 km buffer scale was slightly stronger than at smaller buffer scales. Built-up land had a negative effect on WQPs, but orchard and forest-grassland had a positive effect on WQPs. The effects of water area and farmland on WQPs were complex on different buffer scales. These findings are helpful for improving regional water resource management and environmental planning.

scholarly journals Relationship between Spring Water Quality and Land Use Type in a Small Area

2020 ◽  
Vol 43 (2) ◽  
pp. 55-62
Author(s):  
Morio TSUJI ◽  
Yutaro NAGASAWA ◽  
Hideyuki ITOH ◽  
Masaki SUZUKI
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Small Area ◽  
Spring Water ◽  
Land Use Type

scholarly journals Runoff infiltration, a desktop case study

2011 ◽  
Vol 63 (10) ◽  
pp. 2300-2308 ◽  
Author(s):  
N. R. P. Bastien ◽  
S. Arthur ◽  
S. G. Wallis ◽  
M. Scholz
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Management Practice ◽  
Traditional Use ◽  
Best Management ◽  
Treatment Train ◽  
In Series ◽  
Water Quality And Quantity ◽  
Sustainable Drainage Systems

The use of sustainable drainage systems (SuDS) or best management practice is becoming increasingly common. However, rather than adopting the preferred ‘treatment train’ implementation, many developments opt for end-of-pipe control ponds. This paper discusses the use of SuDS in series to form treatment trains and compares their potential performance and effectiveness with end-of-pipe solutions. Land-use, site and catchment characteristics have been used alongside up-to-date guidance, Infoworks CS and MUSIC to determine whole-life-costs, land-take, water quality and quantity for different SuDS combinations. The results presented show that the use of a treatment train allows approaches differing from the traditional use of single SuDS, either source or ‘end-of-pipe’, to be proposed to treat and attenuate runoff. The outcome is a more flexible solution where the footprint allocated to SuDS, costs and water quality can be managed differently to fully meet stakeholder objectives.

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