Reduction Of Water Depth Research Articles

Probing the complexities of optimal flow in open channels: experimental and numerical validation with diversion flow

ABSTRACT This study aims to establish the optimal diversion angle for bifurcating channels to minimize separation zone size in the intake channel while maximizing discharge in the bifurcating channel through experimental and numerical investigations. The study successfully accomplished its goals by employing the Flow-3D 11.0.4 software. The software was utilized to examine the flow diversion into bifurcating channels with various diversion angles, including 900°, 750°, 600°, 450°, 300°, 250°, 200° and 150°. The experimental investigation has confirmed the theoretical predictions regarding the expected flow characteristics. The conclusive findings demonstrated that the diverted flow is most effectively impacted by a diversion angle of 25°. The study provided findings for various discharges flowing (12.3 and 17 L/s); a total of 95 runs were performed, and investigations revealed that the branching discharge depends on several interconnected parameters. It rises with an increase in the depth ratio. In subcritical flow, the main channel always has a lower water depth than the branch channel. The flowing diversion to the branch channel causes a reduction in water depth downstream of the main channel. The study found that the optimal angle for branching was 25°.

Impact of focused wave groups on pier structures: a case study of severe breaking waves at Pont del Petroli during storm Gloria

In January 2020, the footbridge connecting the seaward platform of the Pont del Petroli pier to Badalona beach collapsed due to the severe sea storm named Gloria. Approximately 15 m of the footbridge fell into the sea as a result of prolonged wave action and strong impacts. To understand the complex interaction between waves and structures that led to the pier’s collapse during the storm, a composite modelling approach was developed. The loads on each pier element were initially evaluated using the meshless DualSPHysics code, which employs the Smoothed Particle Hydrodynamics (SPH) method. This evaluation was conducted under severe wave conditions analogous to those experienced during the storm. Numerical models informed the design of an experimental campaign carried out at the Maritime Engineering Laboratory of Universitat Politècnica de Catalunya—BarcelonaTech, using the CIEM large-scale wave flume facility in Barcelona, Spain. Post-storm bathymetric surveys revealed significant alterations in the seabed profile near the affected infrastructure, including sediment deposition and a reduction in water depth from 10 m to 8 m. Consequently, it was anticipated that wave transformation and breaking in the vicinity of the structure would be substantially affected. To explore this phenomenon, various extreme wave impacts were experimentally simulated using focused wave groups. The physical model findings unveiled the forces that the pier endured during the storm Gloria. The results indicate that wave phases influence individual waves, with waves that are biased and asymmetric experiencing higher peaks than those focused on the crest. This insight helps to explain the structural failure of the footbridge during the storm and underscores the importance of considering wave phase impacts in the design and assessment of coastal infrastructure. The combined numerical and experimental approach provides a comprehensive understanding of the forces at play, contributing valuable knowledge to the field of coastal engineering and infrastructure resilience.

Ecological degradation of a fragile semi-arid wetland and the implications in its microbial community: The case study of Las Tablas de Daimiel National Park (Spain)

Las Tablas de Daimiel National Park (TDNP, Iberian Peninsula) is a semi-arid wetland of international significance for waterfowl and serves as a migratory route for various bird species. However, TDNP presents strong anthropization and fluctuating water levels, making it a highly fragile ecosystem. Water physico-chemical parameters and microbial diversity of the three domains (Bacteria-Archaea- Eukarya) were analysed in Zone A and Zone B of the wetland (a total of eight stations) during spring and summer, aiming to determine how seasonal changes influence the water quality, trophic status and ultimately, the microbial community composition. Additionally, Photosynthetically Active Radiation (PAR) was used to determine the trophic status instead of transparency using Secchi disk, setting the threshold to 20–40 μmol/sm2 for benthic vegetation growth. In spring, both zones of the wetland were considered eutrophic, and physico-chemical parameters as well as microbial diversity were similar to other wetlands, with most abundant bacteria affiliated to Actinobacteriota, Cyanobacteria, Bacteroidota, Gammaproteobacteria and Verrumicrobiota. Methane-related taxa like Methanosarcinales and photosynthetic Chlorophyta were respectively the most representative archaeal and eukaryotic groups. In summer, phytoplankton bloom led by an unclassified Cyanobacteria and mainly alga Hydrodictyon was observed in Zone A, resulting in an increase of turbidity, pH, phosphorus, nitrogen, chlorophyll-a and phycocyanin indicating the change to hypertrophic state. Microbial community composition was geographical and seasonal shaped within the wetland as response to changes in trophic status. Archaeal diversity decreases and methane-related species increase due to sediment disturbance driven by fish activity, wind, and substantial water depth reduction. Zone B in summer suffers less seasonal changes, maintaining the eutrophic state and still detecting macrophyte growth in some stations.This study provides a new understanding of the interdomain microbial adaptation following the ecological evolution of the wetland, which is crucial to knowing these systems that are ecological niches with high environmental value.

Rainwater harvesting systems: An urban flood risk mitigation measure in arid areas

Rainwater harvesting (RWH) systems have been developed to compensate for shortage in the water supply worldwide. Such systems are not very common in arid areas, particularly in the Gulf Region, due to the scarcity of rainfall and their reduced efficiency in covering water demand and reducing water consumption rates. In spite of this, RWH systems have the potential to reduce urban flood risks, particularly in densely populated areas. This study aimed to assess the potential use of RWH systems as urban flood mitigation measures in arid areas. Their utility in the retention of stormwater runoff and the reduction of water depth and extent were evaluated. The study was conducted in a residential area in Bahrain that experienced waterlogging after heavy rainfall events. The water demand patterns of housing units were analyzed, and the daily water balance for RWH tanks was evaluated. The effect of the implementation of RWH systems on the flood volume was evaluated with a two-dimensional hydrodynamic model. Flood simulations were conducted in several rainfall scenarios with different probabilities of occurrence. The results showed significant reductions in the flood depth and flood extent, but these effects were highly dependent on the rainfall intensity of the event. RWH systems are effective flood mitigation measures, particularly in urban arid regions short of proper stormwater control infrastructure, and they enhance the resilience of the built environment to urban floods.

Weed cutting in a large river reduces ecosystem metabolic rates in the case of River Gudenå (Denmark)

Problems related to extensive macrophyte growth are widespread both in modified and man-made canals and streams, and in streams with natural morphology and rich vegetation. The weed cutting is a common management practice in order to reduce flood risk and enhance water conveyance. Although the short- and long-term impacts on the stream physical habitats and biota have been extensively studied, only little information exists on the effects of weed cutting on ecosystem metabolism, especially for larger rivers. This study aims to quantify effects of weed cutting on metabolic rates in a large lowland river in Denmark. We measured Gross Primary Production (GPP), Ecosystem Respiration (ER) and physical parameters (water depth, discharge, water velocity and reaeration rate) one week prior and 2–6 weeks after weed cutting in 2014 and 2020. Physical river conditions changed significantly after the removal of approximately 60% of macrophytic volume, and a significant reduction in water depth and increased water velocity was recorded. We found an immediate 38% and 61% reduction in GPP and 28% and 35% reduction in ER after weed cutting in 2014 and 2020 respectively. We also found that the metabolic rates did not recover to pre-weed cutting levels within 2–6 weeks after weed cutting. The higher decline in GPP compared to that in ER indicates that the heterotrophic contribution to ER was higher compared to the autotrophic contribution. Our results display that even in a large macrophyte-rich river, where only one-third of the channel is managed by weed cutting, GPP and ER can be reduced significantly. The cascade effects of metabolic rates alterations on ecosystem structure and functioning need to be considered in the future management plans, where higher plant biomass and increased flow is anticipated due to the ongoing climate change and thus, the demand for weed cutting might be intensified.

A numerical modelling on the effectiveness of bioretention system for dengue control

Conventional urban drainage structures that store water over time are habitat for the mosquito larvae. Appropriate stormwater management practices can help in preventing the breeding of the mosquito larvae. Thus, a study was conducted to evaluate the performance of a proposed bioretention system in controlling dengue at the campus university in Semenyih, Malaysia. The XP Stormwater Management Model (XPSWMM) was applied for the numerical analysis and modelling in this study. A series of simulations were carried out for the ARI of 2, 5, and 10 years to evaluate the performance under the two scenarios of conventional drainage system and bioretention system, taking into considerations the maximum water depth (stages), inflow volume from runoff, and pollutant load reduction from the sub-catchments to control the breeding of aedes mosquitoes. The simulated results indicated that the bioretention system is capable of reducing the maximum water depth (stages) of the sub-catchments to up to 85% as compared to the conventional drainage system. In addition, the reduction of the inflow volume from runoff ranges from 0.3% to 0.5% and the pollutant loads reduced by approximately 100%. The reduction in water depth and inflow volume will result in mitigating the risk of water stagnancy within all the sub-catchments of the study area. The simulated results demonstrated that bioretention system could be used effectively to control the breeding of mosquitoes. Hence, the findings obtained in this study can assist the decision makers of the university in the adoption of bioretention system to control dengue within the campus.

Ostracod eye size: A taxonomy-free indicator of the Paleocene-Eocene Thermal Maximum sea level

Deep-time sea-level changes associated with the Paleocene-Eocene Thermal Maximum (PETM) are of great interest to paleoceanographers and paleontologists, especially in shallow marine settings, like the Atlantic Coastal Plain PETM sections of the Eastern North American Continental Shelf. Accurate paleo-water depth reconstruction is essential to properly interpret and contextualize any PETM-associated paleoceanographic and paleoecological changes that are depth-dependent. In addition, our understanding on eustatic sea-level changes in the greenhouse world without polar ice sheets remains limited. Despite this importance of an accurate and robust paleodepth reconstruction, all water depth estimation methods applied for the shallow marine PETM sections suffer from uncertainties and intrinsic/logical flaws. It is therefore important to develop and apply an independent water depth proxy to complement and validate paleodepth estimates derived from the traditional estimation methods based on sedimentary fossil components and lithological features. Here we present the relative eye size of sighted ostracods as a taxonomy-free water depth proxy and apply it to shallow-marine PETM paleodepth reconstruction of the Mattawoman Creek-Billingsley Road (MCBR) core in Maryland, eastern USA. We identified a significant and rapid reduction in water depth of ~40 m within the carbon isotope excursion (CIE) onset consistent with the previous estimation based on benthic foraminifer species associations. This ostracod-eye-based paleodepth reconstruction improves current understanding on the regional paleobathymetry of the Salisbury Embayment and facilitates future studies on continental shelf paleoceanography and paleoecology during the PETM, a rapid, extreme global warming event under long-term greenhouse conditions, which possibly parallels the ongoing anthropogenic warming.

Manoeuvring prediction of a container ship in shallow water using numerical planar motion mechanism

ABSTRACT Manoeuvring behaviour of a vessel changes drastically when it enters from deep water region to a shallow water region. Flow characteristics, around the hull changes and the vessel, respond poorly to the use of control surfaces. Aim of this paper is to study the manoeuvring behavioural changes in a container ship for different water depth conditions. Computational fluid dynamic (CFD) methods are used for simulating static and dynamic captive model tests. Variation in hydrodynamic reaction forces and moments caused by the reduction in water depth and the subsequent effect in hydrodynamic derivatives appearing in the equation of motion are explained in detail. Standard turning circle and zigzag manoeuvring tests are simulated using the CFD generated hydrodynamic derivatives to assess the manoeuvring characteristics of the vessel.

A sewer overflow mitigation during festival and rainfall periods: case study of Karbala

The objective of the present study to assess the performance of a suggested sewer line by using pipe jacking system (PJS) in order to enhance the sewage capacity and mitigate sewer flooding of historic pilgrimage city of Karbala, Iraq. The storm water management model (SWMM5) was used for this purpose. The simulation of exiting sewer system reveals that sewer discharge during peak pilgrimage period is more than 200% of the capacity of existing sewer line. Installation of SLL having a diameter of 2.5 m at a depth ranging between 12 and 22 m by PJS can reduce water depth in sewer pipe by 78%. The reduction of water depth at sewer pipe can reduce sewer overflow up to 70%, if the system is installed and managed properly. The methodology proposed in the paper can be applied in any location having similar problem with necessary modifications.

Environmental and Geomorphological Changes on the Eastern North American Continental Shelf Across the Paleocene‐Eocene Boundary

AbstractForaminiferal evidence from two sites in southern Maryland, eastern United States, reveals a series of rapid environmental changes on the continental shelf during the onset of the Paleocene‐Eocene Thermal Maximum (PETM). Benthic and planktic foraminifer assemblages from the South Dover Bridge and Mattawoman Creek‐Billingsley Road coreholes in the central Salisbury Embayment record changing latest Paleocene and earliest Eocene environmental conditions that began prior to the carbon isotope excursion that marks the beginning of the PETM. The foraminiferal response reflects increases in productivity in the bottom water, a minor dissolution event, and sea surface warming in the latest Paleocene. Relative sea level changes, a sudden change in sedimentary regime, and a decrease in bottom water oxygenation occurred in this region across the PETM onset. While South Dover Bridge assemblages support a rise in sea level across the PETM onset, Mattawoman Creek‐Billingsley Road assemblages record a reduction in water depth interpreted as delta progradation and possible tectonic activity. Transitional carbon isotope values are recorded in these delta sediments. We present an initial bathymetric reconstruction of the Salisbury Embayment showing the physical effects of the carbon isotope excursion onset on shelf morphology and highlight the importance of understanding coastal zone processes when examining shelf sediments.

Trait-based evaluation of plant assemblages in traditional farm ponds in Korea: Ecological and management implications

The Korean traditional farm pond called dumbeong is an important rural landscape element that supports local biodiversity and is useful in irrigating agricultural fields during dry periods. This study assesses how plant communities in dumbeongs respond to adjacent land use, water depth, open-water surface, and nutrient levels and irrigation usage. Plant functional and species groups, based on trait and species data respectively from 20 dumbeongs in Seocheon-gun, South Korea, were classified by hierarchical analysis and non-metric multidimensional scaling. Relationships between the plant community composition and explanatory variables at both the species and functional group levels were tested through redundancy analysis. The results showed that irrigation usage prevented nutrient accumulation and water depth reduction of the ponds, and we found water depth was the only significant factor that determined plant composition at both species and functional group levels. The plant functional groups were more useful than plant species in predicting plant composition in dumbeongs, owing to their collective response to water depth and open-water surface. Our results demonstrate that management practices of dumbeong, such as periodic drainage, sediment removal and control of dominant plant species, alter its plant communities and thus need to be considered for biodiversity conservation in agricultural landscapes.

Habitat size changes morphological traits of Physalaemus albonotatus tadpoles

Desiccation exposes tadpoles to a decrease in habitat size due to a reduction in water depth and surface area. We tested the effect of surface area and water depth on growth and development of tadp...

Status of fish and shellfish diversity and their decline factors in the Rupsa River of Khulna in Bangladesh

The study was aimed to find out the present status and causes of fish and shellfish diversity reduction in the Rupsa River of Bangladesh. Studies were conducted for a period of 6 months from July to December 2016. Focus group discussions (FGD), questionnaire interviews (QI) and key informant interviews (KII) were done to collect appropriate data from the local fishers and resource persons. A total of 62 species of fish and shellfish from 23 families were found in the river and 9 species disappeared in last 10 years. The species availability status was remarked in three categories and obtained as 14 species were commonly available, 28 species were moderately available and 20 species were rarely available. The highest percentage of fishes was catfishes (24.19%). There was a gradual reduction in the species diversity from previous 71 species to present 62 species with 12.68% declined by last 10 years. Average fish catch per fishermen per day reduced from 8.35 kg to 2.95 kg in last 10 years. Combined effects of some manmade and environmental factors are responsible for the loss of biodiversity. Majority of the respondents (90%) agreed that two manmade factors namely overfishing and navigation are mainly responsible for the loss of fish and shellfish diversity in the river followed by use of illegal fishing gears (86%), pollution (72.5%) and urbanization (64%). During the survey, 93.25% respondents reported water depth reduction as the main environmental factor followed by siltation and sedimentation (91%), temperature (61.75%) and turbidity (56%). The present work recommends preventing water pollution, maintaining fishing gears, increasing fishers’ awareness, implementing fisheries laws and establishing fish sanctuary to conserve finfish and shellfish diversity in the river. Moreover, counter and random surveys are also recommended to crosscheck the fishes’ status and decline causes for ensuring their proper management and conservation.

Vortex formation in wave-submerged structure interaction

Long wave-structure interaction is studied numerically. The Rayleigh and Goring wave generation theories with a solitary wave with two nonlinearity factors and three discretization schemes for the advective terms for the wave propagation are evaluated. Results show good agreement for the main wave peak and for the wave decay rate. The model captures the trailing waves and some differences on the wave decay rates are observed.Majorcatic and solitary wave cases passing over submerged structure is then studied. For the monochromatic scenario, the model agrees very well with the free surface experimental data, and a ”Linear fluid structure interaction mechanism” can be observed based on the structure geometry and the absence of adverse pressure gradient in the flow. For the solitary wave case interacting with a slender column, the numerical model agrees very well with the measurements, showing that an adverse pressure gradient in the flow is presented and the vortex in the flow induces a wave breaking process, not by the bottom friction, nor by water depth reduction but by a strong transport of mass from upstream to downstream side of the vortex; this turbulent structure is the dominant process, even when the wave breaking is present.

Gas exchange in ‘BRS Princesa’ banana (Musa spp.) under partial rootzone drying irrigation in the north of Minas Gerais, Brazil

This research aimed to evaluate physiological characteristics of 'BRS Princesa' banana under Partial Rootzone Drying irrigation, PRD. The five treatments, 1 - 50% of reduction in water depth (WD) with a frequency alternation of irrigation side (FA) of seven days during the whole production cycle; 2 - 50% of WD and FA of 14 days in the cycle; 3 - 50% of WD and FA of 21 days; 4 - 50% of WD with a fixed irrigation (only one lateral line on one side of the plant); and 5 - full irrigation (two lateral lines with open shutoff valve) throughout the cycle, they were arranged in a randomized block design with five replicates. There is a reduction in photosynthetic rates and water use efficiency as a result of enzymatic impairment or stomatal closure, due to the increased of leaf temperature. The stomatal conductance - gs was lower in plants irrigated with 50% of ETc with fixed irrigation in one side of the plant. Even with water deficit in the soil, using the PRD with 50% of ETc, Photosynthesis - A Transpiration - E; Leaf temperature - Tleaf, internal concentration of CO2 - Ci; stomatal conductance - gs; photosynthetically active radiation - Qleaf; carboxylation efficiency - A/Ci; Quantum efficiency of Photosynthesis - A/Qleaf; and instantaneous water use efficiency - WUE 'BRS Princesa' banana were similar among strategies, highlighting the possibility of use of the irrigation management technique with PRD, saving water, and no physiological changes in the plants.

Effect of river connectivity on hydrochemistry, sediment enzyme activity and biotic communities of wetlands

Wetlands associated with floodplains of the Ganges and Brahmaputra river systems cover an estimated 0.2 million ha and play a vital role in the fisheries, rural economy and environment. In recent years, most wetlands in the states of Bihar, Assam and West Bengal in India have lost connectivity with their parent rivers due to natural and anthropogenic changes. These changes are causing rapid shrinkage of valuable wetlands and threatening their biodiversity and ecological function. The present study was conducted to assess the effect of river connectivity on the hydrochemistry, sediment enzyme activity, and biotic communities of these wetlands. One wetland area having link channels (open) connecting the main river, and another without link channels (closed), were selected from each of the Ganges and Brahmaputra basins for the study. Comparative analysis of open and closed, ecologically distinct wetlands of the Ganges basin revealed greater seasonal reduction in water depth and higher water conductivity (p < 0.04), nutrients (Ca+2, Mg+2, SiO3-Si), sediment microbial activity (p < 0.004), phosphorous cycling enzymes (p < 0.001), carbon cycling enzymes (p < 0.01), organic matter, conductivity, and plankton and macrozoobenthos (p < 0.01) density in the closed wetland. However, the open wetland showed higher diversity of plankton and macrozoobenthos. A profound impact of connectivity on wetland fisheries was observed in the Brahmaputra basin in Assam, where a higher percentage of catch comprised of indigenous fish species with lower fish yield was noted in the open wetland.

Evaluation of the potential impact of Grand Ethiopian Renaissance Dam and pumping scenarios on groundwater level in the Nile Delta aquifer

The main objective of this study is to evaluate the potential impact of Grand Ethiopian Renaissance Dam (GERD) and pumping scenarios on groundwater level by a three-dimensional groundwater model of the Nile Delta using MODFLOW software. The Nile Delta has highly intensive irrigation canal networks that share yearly about 35.5 km3 of water. In this study, an integrated three-dimensional groundwater model is built considering the actual condition of the irrigation canals and their recharges of the Nile Delta aquifer. The model was calibrated for estimating the vertical and hydraulic conductivity. The model was run for three scenarios: (1) reduction of water depth in canals, (2) increasing pumping discharge from the aquifer and (3) combination between the first and second scenarios. Results reveal that the effect of increasing the pumping discharge on groundwater level in the Nile Delta is more significant than decreasing the water depth of the canals network due to the fact of the existence of the upper clay layer which reduces the amount of water penetrating and reaching the groundwater in the aquifer. The last scenario presents the worst case as the average drawdown reached 1.26 m, 1.7 m and 1.35 m in the western, central and eastern parts of the Nile Delta respectively. The study results should be taken in account for studying the saltwater intrusion and climate change impacts on the Nile Delta region.

DISTRIBUIÇÃO DE RAÍZES E EXTRAÇÃO DE ÁGUA DA BANANEIRA ‘BRS PRINCESA’ SOB DIFERENTES CONFIGURAÇÕES DE IRRIGAÇÃO

No presente trabalho, objetivou-se avaliar a distribuição de raízes e a extração de água da bananeira ‘BRS Princesa’ sob diferentes configurações de irrigação em região semiárida do norte de Minas Gerais. Para a condução do experimento, foram adotadas cinco estratégias de irrigação: 50% de redução da lâmina de irrigação (LI) com frequência de alternância de lado da planta (FA) de sete dias; 50% de LI e FA de 14 dias; 50% de LI de FA de 21 dias; 50 % de LI com irrigação fixa (uma linha lateral de um só lado da planta) e irrigação plena (duas linhas laterais com registros abertos) durante todo o ciclo, com amostragens realizadas em quatro distâncias do pseudocaule (0,25; 0,50; 0,75 e 1,0 m) e cinco profundidades (0,05 a 15; 0,15 a 0,25; 0,35 a 0,45; 0,55 a 0,65 e 0,75 a 0,85 m), com as estratégias e amostragens dispostas em delineamento inteiramente casualizado em esquema fatorial 5 x 4 x 5, com três repetições. As médias de densidade de comprimento de raízes (DCR) foram similares entre os tratamentos, entretanto, quando a bananeira foi submetida à irrigação com déficit parcial, expressou tendência de maior desenvolvimento radicular; houve redução da DCR com a profundidade do solo e manutenção da distribuição de raízes com a distância do pseudocaule; as raízes muito finas a pequenas estiveram concentradas até a profundidade de 40 cm no perfil do solo e 70 a 90% destas raízes estiveram localizadas até 75 cm do pseudocaule; intervalo menor de alternância do lado irrigado na PRD possibilitou extração da água em camadas mais profundas.

Yield and quality of ‘Italia’ grapes submitted to irrigation and fertilization control at the San Francisco Valley, Brazil

The aim of this research was to evaluate aspects related to flowering, fruiting and quality of ‘Italia’ grape produced under different irrigation and fertilization. The experiment was performed from October, 2014 to February, 2015, in a production area of 0.50 ha at IFSERTÃO-PE, in Petrolina-PE, Brazil. The experiment was carried out in a randomized blocks design, with a split block scheme, with four irrigation treatments (plots), four fertilizer treatments (subplots) and four repetitions. The plots consisted of the multiplying factors, 0.75 (L1); 1.00 (L2); 1.25 (L3) and 1.50 (L4), of the recommended crop coefficients (Kc) by Embrapa Semi-Arid for the ‘Italia’ grapevine. The subplots were composed by the factors 1.00 (AD1), 0.75 (AD2), 0.50 (AD3) and 0.25 (AD4) of the recommended fertilization with an BIOSON as organic product (commercial name). It was observed that the reduction in water depth provided greater number of buds per branch and a larger number of clusters per plant. The highest yields were obtained with lower irrigation depths and 50% and 65% of the recommended fertilization. The highest soluble solids of the fruit were achieved using the 75% of irrigation Kc and 25% of recommended mineral fertilization. The lower total acidity values were obtained with the Kc multiplication factors that were lower than 1.04 and higher than 1.22.

Technical Assessment on the Operational Performance of Fish Pond in Lagos State, Nigeria

Technical factors that have potential influence on the performance of fish ponds in Lagos State were assessed. Questionnaires and on-the-spot assessment were used for collecting information on pond construction materials, water sources and pond operational problems. Variations in pond water depth during wet and dry seasons were measured using a levelling staff. Physical and chemical properties of soil and water samples were determined in accordance with the American Public Health Association standards. Data were analysed using descriptive statistics. Seepage occurred in 77.8% of the ponds. Also, 80% of the ponds experienced between 20.0 and 81.0% reduction in water depth during the dry season and 18.0 to 34.0% increase in water depth during the rainy season. Soil pH (6.2 – 6.7) was within acceptance limits, Soil permeability (6.2 – 24.9 mm/hr) exceeded the permissible value 4 mm/hr. Nitrogen (20.20 – 29.30 ppm) and phosphorus (1.93 – 6.57 ppm) contents for different soil locations were less than the recommended values of 50.0 and 9.0 ppm respectively. Nitrogen (0.05 – 0.1 ppm) and Phosphorus (0.06 – 0.09 ppm) contents of the water sources were less than the recommended value of 2.0 ppm. These are indications that the soil locations and water sources were not suitable for pond construction and productivity. Improper location and construction on unsuitable site resulting in pond seepage Original Research Article Omofunmi and Olorunnisola; ARRB, 10(3): 1-10, 2016; Article no.ARRB.24938 2 coupled with poor quality of water supply were the major technical factors that could inhibit fish pond performance in Lagos State.