scholarly journals Changes in land use in the buffer zone of lake of the Mała Wełna catchment

2012 ◽  
Vol 12 (1) ◽  
pp. 35-44 ◽  
Author(s):  
Mariusz Ptak ◽  
Agnieszka E. Ławniczak
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Nutrient Loading ◽  
Lake Management ◽  
Buffer Zone ◽  
Nutrient Loads ◽  
Buffer Zones ◽  
Nutrient Sources ◽  
Forested Areas ◽  
Water Pollutant

Abstract One of the most important elements in the protection of water quality is buffer zones. In order to protect water quality, appropriate management of these areas is necessary. In the paper, changes in the land use in the buffer zone of 200 m width around lakes in the Mała Wełna catchment over 20 years were analysed. For the study eight lakes larger than 50 ha were chosen. Changes in the land use within the buffer zone were studied from 1980 to 2000, based on topographic maps in the scale 1:10 000. Results show both positive and negative aspects of land changes. An increase in forested areas and grasslands through tilled land were positive aspects of these changes. On the other hand, the enhancement of suburban development in these zones caused increased probability of water pollution from these areas. Calculations of potential nutrient loading from different types of land use in these zones indicated an enhancement of nutrient sources in the lakes within the 20-year study period. However, these changes are not significant in comparison to the nutrient loads contributed by the tributaries. Our study indicated that in the case of flow lakes, more important is an improvement in water quality in the tributaries and a reduction in nutrient sources in the catchment with the purpose of reducing the input of nutrients into the lake. Management of the buffer zone is one of the issues which have to be taken into consideration in lake protection after elimination of the major water pollutant sources.

scholarly journals Cost-Benefit Analysis of continuous cover forestry and buffer zones as Nature Based Solutions to preserve water quality level in Lake Puruvesi and in its sub-catchment area.

2020 ◽  
Author(s):  
Jaakko Juvonen
Keyword(s):  
Water Quality ◽  
Nutrient Loading ◽  
Cost Benefit Analysis ◽  
Cost Benefit ◽  
Buffer Zone ◽  
Social Benefits ◽  
Quality Level ◽  
Benefit Analysis ◽  
Buffer Zones ◽  
Continuous Cover Forestry

<p>Mitigation of the perceived risks of climate change is urgent issue in many fields. This research focuses on providing information to support decision making in mitigation of hydro-meteorological risks that climate change causes to the water quality in Lake Puruvesi and in its sub-catchment area. This study reviews continuous cover forestry (CCF) and buffer zones as possible nature-based solutions (NBS) that could achieve the goal of keeping the water quality level in study site on current level or improve it. The main research question of this research is: Is it economically cost-efficient to implement continuous cover forestry and buffer zones as nature-based solutions to mitigate nutrient loading in research area so that the water quality will stay at least at the current level in the future?</p><p>Previous research has shown that CCF can be economically feasible way to manage forests. In addition to this, continuous cover forestry and buffer zones can reduce nutrient loading from forests to nearby waters. These solutions are evaluated in the framework of cost-benefit analysis which is the main method in this study. The aim is to monetize costs and benefits that NBS implementation will cause. If the net social benefits after analysis are positive, the project should be recommended. In this study recreation values from the study site were obtained by utilizing pre-existing valuation studies made by Finnish Natural Resource Center. Costs on the other hand were derived by using size-structured forest optimization model. The economic loss for forest owners is the difference between their optimal forest management choice, and the optimized solution, where clearcutting is restricted. In the buffer zone case optimization was similar but the costs from buffer zones are directly the maximized profits from forest as the buffer zone is completely left out from any forestry.</p><p>In both cases CCF was the optimal forest management regime for the sample forests. When these costs were compared to the benefits this study produced positive net social benefits and hence CCF and buffer zones should be recommended as NBS in the study site. However, there are quite large assumptions made in this study, and further modeling of nutrient flow in study site is required as the quantified impacts of nutrient run-off are still unclear. For this reason, further research is required for more precise analysis regarding quantified impacts.</p>

scholarly journals Impacts of Land Use and Land Cover on Water Quality at Multiple Buffer-Zone Scales in a Lakeside City

Water ◽  
2019 ◽  
Vol 12 (1) ◽  
pp. 47 ◽  
Author(s):  
Wenqin Huang ◽  
Jingqiao Mao ◽  
Dejun Zhu ◽  
Chenyu Lin
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Land Cover ◽  
Urban Areas ◽  
Buffer Zone ◽  
Wet Season ◽  
Buffer Zones ◽  
Significant Difference ◽  
The Relationship ◽  
Positive Effect

Understanding the effect of land use/land cover (LULC) on water quality is essential for environmental improvement, especially in urban areas. This study examined the relationship between LULC at buffer-zone scales and water quality in a lakeside city near Poyang Lake, which is the largest freshwater lake in China. Representative indicators were selected by factor analysis to characterize the water quality in the study area, and then the association between LULC and water quality over space and time was quantified by redundancy analysis. The results indicated that the influence of LULC on water quality is scale-dependent. In general, the LULC could explain from 56.9% to 31.6% of the variation in water quality at six buffer zones (from 500 m to 1800 m). Forest land had a positive effect on water quality among most buffer zones, while construction land and bare land affected the representative water quality indicators negatively within the 1200 m and 1500 m buffer zones, respectively. There was also a seasonal variation in the relationship between LULC and water quality. The closest connection between them appeared at the 1000 m buffer zone in the dry season, whereas there was no significant difference among the buffer zones in the wet season. The results suggest the importance of considering buffer-zone scales in assessing the impacts of LULC on water quality in urban lakeshore areas.

scholarly journals Land Use and Water Quality

Water ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2412
Author(s):  
Brian Kronvang ◽  
Frank Wendland ◽  
Karel Kovar ◽  
Dico Fraters
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Surface Waters ◽  
New Technologies ◽  
Pollution Source ◽  
Mitigation Measures ◽  
Nitrogen Surplus ◽  
Nutrient Sources ◽  
Erosion Processes ◽  
Sources Of Pollution

The interaction between land use and water quality is of great importance worldwide as agriculture has been proven to exert a huge pressure on the quality of groundwater and surface waters due to excess losses of nutrients (nitrogen and phosphorous) through leaching and erosion processes. These losses result in, inter alia, high nitrate concentrations in groundwater and eutrophication of rivers, lakes and coastal waters. Combatting especially non-point losses of nutrients has been a hot topic for river basin managers worldwide, and new important mitigation measures to reduce the input of nutrients into groundwater and surface waters at the pollution source have been developed and implemented in many countries. This Special Issue of the Land use and Water Quality conference series (LuWQ) includes a total of 11 papers covering topics such as: (i) nitrogen surplus; (ii) protection of groundwater from pollution; (iii) nutrient sources of pollution and dynamics in catchments and (iv) new technologies for monitoring, mapping and analysing water quality.

scholarly journals Spatial evaluation of land use variability on water quality of the Densu Basin, Ghana

2020 ◽  
Vol 20 (8) ◽  
pp. 3000-3013
Author(s):  
Rita Akosua Anima Gyimah ◽  
Anthony Yaw Karikari ◽  
Charles Gyamfi ◽  
Patricia Asantewaa-Tannor ◽  
Geophrey Kwame Anornu
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Multiple Regression ◽  
Positive Relationship ◽  
Total Hardness ◽  
Buffer Zones ◽  
Land Use Types ◽  
Basin Scale ◽  
Bare Land

Abstract The effect of different land use types on the physicochemical water quality of a semi-arid coastal basin is examined. From nine sites, a comprehensive sampling campaign was executed during October 2018 to January 2019. One-way analysis of variance (ANOVA), Pearson correlation and multiple regression analyses were used to determine the relationship between water quality characteristics and land use types at the sub-basin and buffer-zone scales. The one-way ANOVA test indicated that most of the parameters are significantly different (p < 0.05) among the sampling sites with the exception of pH, total hardness (TH), nitrate-nitrogen (NO3-N), ammonia-nitrogen (NH3-N), dissolved oxygen (DO), chemical oxygen demand (COD) and iron (Fe). Agriculture and built-up/bare land had a positive relationship with turbidity, TSS, conductivity and Fe within 50 m and 150 m buffer zones. Built-up/bare land showed a positive relationship with turbidity, TSS and Cl at the sub-basin scale. Forest cover correlated negatively with water quality although not significantly. Grassland correlated significantly with temperature, Cl and total hardness. Results of the multiple regression analysis indicate that land use types within the riparian buffer zones had greater impact on water quality than at the sub-basin scale. This work provides essential information for land use planners and water managers towards sustainable water resources management.

scholarly journals Complex Small-Holder Agriculture in Rainforest Buffer Zone, Sri Lanka, Supports Endemic Birds

2021 ◽  
Vol 9 ◽  
Author(s):  
Juliana Hanle ◽  
Balangoda M. P. Singhakumara ◽  
Mark S. Ashton
Keyword(s):  
Land Use ◽  
Species Richness ◽  
Sri Lanka ◽  
Buffer Zone ◽  
Small Scale ◽  
Forest Fragments ◽  
Buffer Zones ◽  
Bird Abundance ◽  
Point Counts ◽  
Zone Management

The Sinharaja rainforest in southwestern Sri Lanka is a protected forest in a largely agriculture-dominated landscape. In keeping with global UNESCO global biosphere reserves planning, the Sinharaja is surrounded by a buffer zone of regenerating forest and villages with small tea plots and multi-strata tree gardens (homegardens). Globally, however, conservation planning lacks standards on buffer zone management. We ask what relationships exist between village land use and bird assemblages, which are effective ecosystem indicators. Birds have been little studied across land use and vegetation structure in actively managed, large, protected forest buffer zones. To that end, we ran spatially- and temporally-replicated bird point counts across tree gardens, forest fragments, and tea plots within a Sinharaja village. Tree gardens held a greater abundance of birds across habitat association, conservation concern, diet, and endemic species than forest fragments or tea plots. Forest fragments and tree gardens hosted statistically similar numbers of birds in some subsets, but their species assemblages differed. In tea plots, greater shade tree species richness correlated with greater bird abundance and species richness. Our results support the argument for programs to support complex small-scale tree-based agroforestry embedded in buffer zone regenerating forest.

scholarly journals The use of epilithic diatom assemblages in assessing land use in Silago, Southern Leyte, Philippines

2019 ◽  
Vol 12 (2) ◽  
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Tolerance Index ◽  
Diatom Species ◽  
Diatom Assemblages ◽  
Pollution Tolerance ◽  
Land Use Types ◽  
Freshwater Bodies ◽  
Forested Areas ◽  
Epilithic Diatom

Silago is a municipality in Southern Leyte in which logging for high-quality timber and land clearing for agricultural purposes threaten stream ecosystems. The objective of this study was to assess the response of diatom assemblages in relation to land use. Diatoms and water quality sampling was done at 27 sites on two sampling occasions (June and July 2014). Multiple diatom metrics were calculated to measure the response of diatoms to changes in land use. In all, 135 diatom species distributed to 48 genera were recorded. The results showed that diatom species and their attributes gave similar responses to those obtained in environmental variables. Pollution tolerance index classified all sampling sites as oligo-b-mesosaprobic. Meanwhile, Cymbella richness, percent motile taxa, and percent Achnanthidium minutissimum indicated good water quality in forested areas, distinguishing them from other land use types. Contrary to other studies, species richness was found to increase with greater degrees of disturbance, thus giving unreliable evaluation of water quality. Overall, the study suggests that epilithic diatoms can be applied in biomonitoring of freshwater bodies in the country.

Cross Media Inputs to Eastern US Watersheds and Their Significance to Estuarine Water Quality

1992 ◽  
Vol 26 (12) ◽  
pp. 2675-2683 ◽  
Author(s):  
D. L. Correll ◽  
T. E. Jordan ◽  
D. E. Weller
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Atmospheric Deposition ◽  
Ground Water ◽  
Chesapeake Bay ◽  
Drainage Basin ◽  
Point Sources ◽  
Estuarine Water ◽  
Buffer Zones ◽  
Estuarine Water Quality

Extensive research on Chesapeake Bay estuary, its drainage basin, and its airshed have now demonstrated that atmospheric deposition and diffuse land discharges are the largest sources for many parameters affecting estuarine water quality. For example, phosphorus and sediments are transported to the Bay largely in overland storm flows, nitrate largely in atmospheric deposition and in ground water, many pesticides and other toxic materials in surface waters and atmospheric deposition, and silicate primarily in ground water. Concerns over point sources such as sewage treatment outfalls and industrial outfalls have led to greatly improved treatment methods, alleviating the relative magnitude of these sources. The realization of the magnitude and importance of diffuse sources has led to research on improved land use practices, including better patterns of land use in the Chesapeake Bay landscape. One example is the use of and improved management of forested riparian buffer zones in the coastal plain part of the drainage basin.

Spatial and Temporal Variation of Water Quality of Typical Rivers in the River-Network Plain to the East of Tai Lake

2012 ◽  
Vol 518-523 ◽  
pp. 4253-4260 ◽  
Author(s):  
Rong Rong Wan ◽  
Xin Yao ◽  
Zhong Hua Yu ◽  
Ya Wen Dong
Keyword(s):  
Water Pollution ◽  
Water Quality ◽  
Land Use ◽  
River Water ◽  
Cross Sections ◽  
Buffer Zone ◽  
River Network ◽  
Spatial And Temporal Variation ◽  
Flow Parameters ◽  
Tai Lake

Nine cross sections of three typical rivers in the river-network plain to the east of Tai Lake were selected to measure water quality and water flow parameters monthly from September 2007 to August 2008. The spatial and temporal features of water quality were analyzed and the water pollution loads at river sections were estimated using statistic analysis. Combining land use in the riparian buffer zone interpreted form Remote Sensing images, the relationship between river water pollution load and land use were analyzed. It was clear that river water in the study area was polluted so seriously that water quality was ranked Grade V or worse. Pollutant input process in most river sections prevailed river self-purifying process. River qualities varied seasonally as that pollutant were denser in spring and winter than that in summer and autumn. Residential land in the 100 m buffer zone and industrial land in the 500 m buffer zone had the greatest influence on water quality. Forested and grassed riparian land appeared important in mitigating water quality degradation.

scholarly journals The impact of land use on the water quality of foothill microcatchment areas

2008 ◽  
Vol 40 (1) ◽  
pp. 27-37
Author(s):  
Andrzej Misztal ◽  
Marcin Kuczera
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Water Samples ◽  
Negative Influence ◽  
Rural Settlements ◽  
Quality Of Water ◽  
Catchment Areas ◽  
Forested Areas ◽  
The Impact

The impact of land use on the water quality of foothill microcatchment areas The impact of land use on the water quality of foothill microcatchment areas. In this paper a comparison is made between the impact of land use methods on the quality of water in the streams which drain various catchment areas. For this purpose three microcatchments were selected which are located in agricultural, rural settlements, and forested areas. Water samples were physically and chemically analysed in order to determine: nitrates, nitrites, ammonia, phosphates, sulphates, chlorides, calcium, magnesium, dissolved oxygen, reaction and conductivity. The above studies were conducted in the 2006 and 2007. Our analysis of the collected materials allows us to affirm that land use methods have a significant impact on the water quality of the streams which drain the area. Rural settlement has the most negative influence on the water quality, followed by typical agricultural use. Based on the direct quality evaluations of single water samples, it has been found that only water from forested areas can be qualified as belonging to the 1st cleanness class.

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