Local determinants influencing stream water quality

Hamid, Aadil; Bhat, Sami Ullah; Jehangir, Arshid

doi:10.1007/s13201-019-1043-4

Cited by 115 publications

(65 citation statements)

References 192 publications

(200 reference statements)

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“…Figure 6). Chloride sources in surface water may include rocks containing chlorides, agricultural runoff, wastewater from industries, oil well wastes, industrial and waste water effluents and road salting [22,23]. Samples from the tributaries and shores of the dam had higher chloride concentration than the mid-waters of the dam, confirming chloride sources are from runoffs into the dam but they all become diluted to lower concentration within permissible limit on settling in the dam [15].…”

Section: Figure 3 Electrical Conductivity Of Water and Sediment Samplesmentioning

confidence: 99%

Physicochemical analysis of water and sediments of Usuma Dam, Abuja, Nigeria

Ilechukwu

Olusina

Echeta

2020

Ovidius University Annals of Chemistry

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Usuma Dam is the major source of potable water in the Federal Capital Territory, Abuja, Nigeria. The physicochemical properties of water and sediment of the dam was assessed in this study to determine its quality. Electrical conductivity, pH, nitrate, phosphate, total dissolved solids, total suspended solids, turbidity, dissolved oxygen, biochemical oxygen demand, chemical oxygen demand, chloride, total hardness, phosphate, nitrate and sulfate were determined in the water samples. Total organic matter, total organic carbon and particle size were among the parameters analyzed in sediments. The parameters were within recommended limits except for biochemical oxygen demand and chemical oxygen demand which were more than the recommended limit of 10 mg/L and 30 mg/L respectively. The total organic matter and the total organic carbon in the sediment samples were between 1.56±0.27 – 2.85±0.20 % and 0.13±0.03 – 0.96±0.03 % respectively. The particle size was in the following order: sand > silt > clay. The results of this study confirmed the presence of high organic and inorganic matter in the dam from non-point pollution sources occasioned by storm water from poorly planned settlements around the dam and runoffs from agricultural practices.

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Section: Figure 3 Electrical Conductivity Of Water and Sediment Samplesmentioning

confidence: 99%

Physicochemical analysis of water and sediments of Usuma Dam, Abuja, Nigeria

Ilechukwu

Olusina

Echeta

2020

Ovidius University Annals of Chemistry

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“…This limits channel migration and reduces the formation of secondary channels. Channelization T A B L E 1 Change in natural flow regime components and some ecological response (modified after Poff et al, 1997;Poff & Zimmerman, 2010;Zeiringer et al, 2018) The change in the instantaneous velocity of rivers impact predators, decrease their mobility (Hamid, Bhat, & Jehangir, 2020) and thus gaining access to their prey (Abebe et al, 2020). The spatial aspects of fast-flowing habitats, for example, riffles, are highly vulnerable to alterations during low-flows.…”

Section: Impact Of Altering Nfr On the Biotic Composition Of Riversmentioning

confidence: 99%

The natural flow regime: A master variable for maintaining river ecosystem health

et al. 2020

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River health is sustained by time-based variation in their flows, and the maintenance of natural flow regime is essential for keeping the rivers healthy. However, the dynamism in natural flow regime now stands altered by changing climate, and the omnipresent regulation of river flows throughout the world has severely impacted the river health. It is well documented that harnessing and altering the flow of the rivers and streams comes at a huge cost. Numerous rivers in the world have stopped supporting socially and economically important native species or sustain vibrant ecosystems that offer valuable goods and services. The alteration of the natural flow regime has led to the collapse of many healthy and resilient river ecosystems throughout the world. Therefore, to ensure appropriate naturalized flow regimes for riverine organisms and a sustainable nexus between energy demand, water requirements and climate, more understanding is required to study the consequences of alteration in natural flow regime triggered by climate change and anthropogenic interventions. Moreover, conservation and management practices must be firmly based on scientific principles to restore the integrity of river ecosystems. The current approaches often fail to take into consideration a basic fundamental principle that the integrity of the river ecosystem is largely determined by the natural dynamic character of their flow regimes. In this synthesis, we try to explain how the maintenance of the natural flow regime is an essential requirement for maintaining river ecosystem health. K E Y W O R D S environmental flow, natural flow regime, river ecosystem, river health 1 | INTRODUCTION Rivers are important for the maintenance of ecological health, economic prosperity and human welfare, and the innate rhythm of the rivers is indispensable to human welfare even today (Palmer & Ruhi, 2019). For ages, rivers have provided food to the masses, water for domestic consumption, agricultural activities and transportation (Grill et al., 2019). The flow of rivers link people, places and various other life forms, inspire and support diverse cultural philosophies, ideas and ways of life (Anderson et al., 2019). The basic human need for freshwater (Poff et al., 1997) and development (Blythe & Schmidt, 2018) has led to the dramatic alteration of river ecosystems in the world. The rivers were subjected to anthropogenic pressures by means of fragmentation, leading to the loss of connectivity. This limits their potential to flow unimpeded and hamper their fundamental processes and functions (Dudgeon et al., 2006). These alterations result in rapid reduction of biodiversity and ecosystem services (Cardinale et al., 2012) and restrict various geomorphic processes (Sinnatamby et al., 2020). The practices such as regulation of different thermal regimes and water quality (Sabater et al., 2018), carbon input to aquatic food webs, supply of wood and physical space for habitat through the terrestrial-aquatic ecotone (Naiman & Decamps, 1997)

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“…Walling and Webb [14] highlighted the river runoff, drainage basin geology, and climatic regime in determining the fluvial discharge of dissolved matter. Although chemical weathering principally releases major ions to rivers, these major ions may not have a strong impact on estuarine and oceanic ecosystems [15]. On the other hand, recent increasing loads of organic matter and nutrients may have tremendously altered the quality of water and habitants in both river and coastal oceans [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Rainfall and Human Impacts on Weathering Rates and Carbon-Nutrient Yields in the Watershed of a Small Mountainous River (Kaoping) in Southwestern Taiwan

et al. 2020

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This study presents the influence of rainfall and human perturbation on physical and chemical weathering rates, and carbon and nutrient yields in the basin of the Kaoping, a small mountainous river (SMR) in southwestern Taiwan. The study was derived principally from the spatial and temporal variability of aquatic geochemistry in the river during wet (1999–2000) and drought (2002) periods. The total, physical, and chemical weathering rates in the river basin ranged respectively from 4739, 3601, and 1138 g m−2 year−1 in the wet period to 1072, 656, and 416 g m−2 year−1 in the drought period, resulting mainly from a large difference in rainfall and river discharge between the two periods. The wet and drought periods were likely associated with La Niña and El Niño events, respectively. The weathering rates of the wet period were much higher than those reported from the world’s river basins, showing the unique characteristics of the SMR. The total carbon yield was derived mainly from dissolved inorganic carbon and was much higher in the wet period (140 g C m−2 year−1) than in the drought period (53.7 g C m−2 year−1). Taking silicate weathering (54.7 ± 10.2%) slightly over carbonate weathering (48.6 ± 9.5%) in determining dissolved ion loads, the Kaoping catchment may currently consume 0.155–0.298 MtC/year atmospheric CO2 without considering the CO2 released from chemical weathering. The nutrient yields were controlled mainly by human inputs but also enhanced by increased rainfall. Both regional and local climatic conditions and human impacts likely determined the weathering rates and total yields of carbon and nutrients. The SMRs may collectively contribute significantly to global fluxes of terrestrial sediments, geochemical matters, carbon, and nutrients to oceans.

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Local determinants influencing stream water quality

Cited by 115 publications

References 192 publications

Physicochemical analysis of water and sediments of Usuma Dam, Abuja, Nigeria

Physicochemical analysis of water and sediments of Usuma Dam, Abuja, Nigeria

The natural flow regime: A master variable for maintaining river ecosystem health

Rainfall and Human Impacts on Weathering Rates and Carbon-Nutrient Yields in the Watershed of a Small Mountainous River (Kaoping) in Southwestern Taiwan

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