River Boundary Research Articles

Early Canadian Aerial Photography: The St Croix River and the International Boundary, 1921

The early 1920s constitute a tentative yet pivotal period for the institution of aerial photography as an innovative surveying and mapping tool in Canada. This study focuses on vertical air photos from an experimental survey conducted in 1921 over the St Croix River boundary between Canada and the United States. Reconstituted as a plan-view mosaic, the photographs reveal a dense cluster of early twentieth century cultural-industrial features and activities that has since vanished. The study suggests that the 100-year-old set of largely unknown aerial photographs at Canada’s National Air Photo Library is a valuable source of geospatial information for historical and environmental research.

Identifying Stagnation Zones and Reverse Flow Caused by River‐Aquifer Interaction: An Approach Based on Polynomial Chaos Expansions

AbstractFluctuating stream stages and peak‐flow events can significantly influence the interactions between streams and aquifers and modify the hydraulic gradient, the flux exchange and the subsurface flow paths. As a result, stagnation zones and reverse flow may appear in different parts of an aquifer and at different times. These features of the flow field play a relevant role in the transport, transformation, and residence time of solutes, pollutants, and nutrients in the subsurface. However, their identification using numerical models is complex not only because of highly nonlinear dynamics, but also due to significant uncertainties in the model input data which propagate into the quantities of interest. In this work, we use an approach based on polynomial chaos expansions to map the probability of occurrence of stagnation zones and reverse flow during a flood event. We quantify the propagation of uncertainty into the groundwater flow field due to the applied river boundary conditions. Then, we evaluate the responses of the posterior probabilities in an element‐wise fashion using a set of flow classification criteria and kernel density estimations. The proposed methodology is flexible because it employs a nonintrusive pseudo‐spectral technique and, consequently, it can be applied straightforwardly in preexisting models. The regions near the confluence of two streams in the studied area are prone to present transient stagnation and reverse flow.

Improvement of the Theis unsteady well flow model with infiltration recharge in a phreatic aquifer

The recharge and discharge of groundwater are mainly vertical surface infiltration recharge, evaporation discharge (evaporation can be shown as negative value of infiltration) and lateral surface water recharge and discharge. One of the most basic problems in hydrogeology is the evaluation criteria of sustainable exploitation of groundwater, which involves the increment of recharge and the decrease of discharge. Therefore, the prediction model of groundwater exploitation must include the above two kinds of recharge and discharge factors, otherwise the evaluation of groundwater cannot meet the requirements. However, the classic Theis unsteady well flow model (1935) only involves the recharge and discharge of the side boundary, and does not considers the surface infiltration recharge of the upper boundary, even when groundwater is pumped near the river. In this way, the analytical model cannot be basically used for prediction, and can only be used for well flow test to obtain the aquifer parameters in dry season. Therefore, the goal of this paper is to develop the Theis unsteady well flow model with surface infiltration recharge. For the problem of phreatic flow, the equation of groundwater flow cannot be established by using head as the dependent variable in a confined aquifer. We use the potential function of the second linearization method to establish groundwater flow equation in the phreatic aquifer. For the solution of the generalized mathematical model of the complex hydrogeological problem with rainfall infiltration and a pumping well, we adopt the method of decomposing it into several simple sub-models and synthesizing them into the solution of the original complex mathematical model. Based on the principle of mass conservation and assuming that the seepage obeys the Darcy’s law and satisfies the Dupuit's assumptions, the differential equation of groundwater flow is established. Then, for the well flow problem with uniform and stable infiltration recharge in two parallel rivers and two kinds of strip regions formed by a river parallel to an impermeable boundary, the general equation of groundwater flow and several kinds of water table equations under specific conditions and their flux equations are obtained. In addition, the “boundary to boundary reflection method” is proposed and applied to solve the same problem in a strip of region between a river boundary in parallel to an impermeable boundary, which reduces many derivation processes. Finally, as a preliminary application of the above theoretical results, it is also an important application, that is, there is a pumping well near the river whose water quality cannot meet the requirements, and the critical flux equation of the pumping well is calculated on the premise of not absorbing the river water. The important and concise relation equation is obtained. The equation can also be used to calculate the critical pumping rate of pumping wells in coastal areas without seawater intrusion. In this paper, the groundwater flow network diagram at a certain time in the process of unstable well flow under the above conditions is given. Compared with the flow network of well flow near the river, which is commonly seen in the literature, the flow network has obvious characteristics.

Hydrogeological Conceptual Model in the Middle of Randublatung Groundwater Basin

Randublatung groundwater basin is one of the groundwaters basins with massive utilization of groundwater pumping. However, the knowledge of the comprehensive hydrogeological system in this groundwater basin is limited, so this research aims to determine a comprehensive hydrogeological conceptual model of the Randublatung groundwater basin. The methodology was conducted by collecting secondary and primary data of deep and shallow wells to evaluate boundaries of pattern and direction of groundwater flow and develop the aquifer system’s geometry. The result shows that the groundwater flow boundaries are Grogol River in the west, Wado River in the East, Bengawan Solo river in the South as a river boundary, and Rembang Mountains in the North as a constant head boundary. Therefore, groundwater flows from the hills area to the Bengawan Solo River and the north as the river’s flow. Based on the log bor evaluation, the aquifer system of the study area consist of an unconfined aquifer with a maximum thickness of 20 m and three layers of confined aquifers with thickness vary between 8 to 60 m. the hydraulic conductivity of the aquifers depends on the aquifer’s lithology range from sand, gravel, limestone, and sandstone. This hydrogeological conceptual model provides essential information for numerical groundwater models in the middle of the Randublatung groundwater basin.

Toward improved river boundary conditioning for simulation of extreme floods

Hydrodynamic modeling is a common approach for flood inundation mapping. These models use conservation of mass and momentum to simulate the river hydrodynamics during flood events. To simulate floods and estimate the spatio-temporal distribution of extreme water levels, the upstream and downstream flows are used as the minimum required boundary conditions (BCs) in a hydrodynamic model. In this study, we show that such approach does not provide a realistic estimate of fluxes at boundaries and so poses uncertainty to estimated flood inundation, especially during extreme floods. To overcome these limitations, we propose a new BC approach that demonstrates the significance of two additional BC components, namely lateral flows and vertical fluxes, applied to the channel, and incorporates hydrologic bias impacts into the hydrodynamic model setup. The basis for applying these BC modifications is to conserve the water mass flux into the river systems during extreme flood events. We utilize two well-known hydrodynamic flood inundation models, LISFLOOD-FP and HEC-RAS 2D, to simulate a flash flood in 2016 as well as an extreme flood during Hurricane Harvey in fully-gauged and semi-gauged river systems, respectively. Results from both case studies confirm that modeling with only upstream and downstream BCs underestimates the flood hydrographs and inundation areas while using the proposed BC approach can significantly improve the modeling performance.

The Ecosystem Services Value Change and Its Driving Forces Responding to Spatio-Temporal Process of Landscape Pattern in the Co-Urbanized Area

The development of urbanization is still expanding on the earth, and the rapid expansion of cities has changed the regional landscape pattern and significantly affected the value of regional ecosystem services in developing countries such as China. Zhongmu County, as the core area of Zhengzhou-Kaifeng integration, studying the temporal and spatial transformations of its landscape pattern and ecosystem service value (ESV) is of great significance to the region’s sustainable development. Based on remote sensing images and socioeconomic data, this study aims to explore the landscape pattern of Zhongmu County from 2005 to 2018 and its impact on ESV. Research methods include an ESV equivalent factor method, landscape pattern index, spatial autocorrelation, and other methods. The results showed that: (1) During the study period, the patch density and shape complexity, landscape diversity, and fragmentation of the overall landscape in the study area continued to increase while landscape connectivity decreased. (2) The total amount of ESV increased by 10.05 million USD; ESV had certain differences in spatial distribution: high-value clusters were mainly located at the boundary of the Yellow River in the north, while low-value clusters had a significant eastward expansion trend. (3) ESV increased significantly in areas where cultivated land was transferred to waters and forests, and ESV in areas where waters transferred to construction land and cultivated land was significantly reduced. (4) ESV had a significant positive spatial correlation with patch density, edge density, mean patch fractal dimension, mean patch size, and the landscape shape index, and a spatially negative correlation with the contagion index and cohesion index. The spatial and temporal changes in landscape patterns and ESV were all mainly driven by the regional development “Zhengzhou-Kaifeng integration” policy. Therefore, the ESV can be improved, and the ecological security of the urban integration area can be guaranteed through policy measures such as optimizing the layout of construction land and adjusting the uniform distribution of green areas by the land-use policy.

Environmental management for urban development around river valleys using a conceptual model

BACKGROUND AND OBJECTIVES: Urban river valleys are so important with regard to their benefits and functions, including air temperate, microclimate creating, landscape, fresh water supplement. Urban development over considering environmental issues, population density, constructions, solid waste or effluent discharging, especially in quantitative and qualitative river boundaries and land taking of their beds, are significant reasons to decline cities functions and ecosystems degradation. So, natural ecosystems should be restored and a thorough strategic planning is necessary for their conservations. METHODS: With regards to managerial aspects involving ecological, spatial, economic, socio-cultural, and managerial- executive dimensions integrated management model has been recommended for Farahzad River Valley in Tehran city as a case study via Urban River Survey and Geographic Information System. Finally, effective and efficient strategically management plan was suggested by implementing SWOT, QSPM and Analytical Hierarchy Process.RESULTS: Amongst 12 identified strategies regulation settings, “correlation between green space and the surrounding park”, and “preventing the increase of residential” and “the expansion of recreation” are prioritized as most significant strategies, scores have been calculated 5.616, 5.589, and 5.375 on QSPM matrix or 0.256, 0.192, and 0.133 by AHP method, respectively.CONCLUSION: in overall, systemically, multi dimensional and holistic decision of river valleys environmental management is a magnificent example that provides essential tools to urban planners. Environmental and ecological approaches of the model are counted as a main key of succession to sustainable development achievement and its advantage to other past studies.

Numerical Modelling of Oil Spill Transport in Tide-Dominated Estuaries: A Case Study of Humber Estuary, UK

Oil spills in estuaries are less studied and less understood than their oceanic counterparts. To address this gap, we present a detailed analysis of estuarine oil spill transport. We develop and analyse a range of simulations for the Humber Estuary, using a coupled hydrodynamic and oil spill model. The models were driven by river discharge at the river boundaries and tidal height data at the offshore boundary. Satisfactory model performance was obtained for both model calibration and validation. Some novel findings were made: (a) there is a statistically significant (p < 0.05) difference in the influence of hydrodynamic conditions (tidal range, stage and river discharge) on oil slick transport; and (b) because of seasonal variation in river discharge, winter slicks released at high water did not exhibit any upstream displacement over repeated tidal cycles, while summer slicks travelled upstream into the estuary over repeated tidal cycles. The implications of these findings for operational oil spill response are: (i) the need to take cognisance of time of oil release within a tidal cycle; and (ii) the need to understand how the interaction of river discharge and tidal range influences oil slick dynamics, as this will aid responders in assessing the likely oil trajectories.

Vessel navigation risk and stern-swing index in sharp bend channels

Owing to the drastic change in flow conditions and river boundary of sharp bend channels, marine accidents occur frequently. A typical sharp bend channel was selected, whose flow velocity and navigation were studied by using a scaled hydrodynamic model and scaled vessel model maneuvering test. Based on the vessel speed, drift angle, and transverse flow velocity, the stern-swing index Δ was deduced, and a navigation risk model was established, which showed different navigation status and corresponding ranges of Δ. Transverse flow velocity is usually larger at the impact point of current on the river bank. The impact point moves downstream when flow rate increases. The hull undergoes swing, rotation, and drift under the combined action of current force and rudder force, the resultant moment caused by these two forces was represented by Δ. When the absolute value of Δ is in the range of 0–1.2, it can be used to judge the risk of a vessel passing through the sharp bend channel.

Air pollution and employee treatment

Although the impacts of air pollution on individual health are well documented, it is unclear whether and how air pollution affects firm strategy on employee treatment. This study examines this issue in the context of China and presents strong evidence that air pollution significantly enhances employee treatment. To establish causality, we further instrument for air pollution using thermal inversions, introduce a regression discontinuity approach relying on the Huai River boundary, and a falsification test. Monetary compensation, safety security, and career training jointly determine our findings. Two plausible mechanisms are corporate brain drain and public attention. Our results are more pronounced for non-state-owned firms, and firms with less financial constraints, intensive R&D or competition, and increased job market opportunities. Overall, we highlight that air pollution is an important noneconomic factor driving firms' human capital and employee treatment strategy.

Tackling random fields non-linearities with unsupervised clustering of polynomial chaos expansion in latent space: application to global sensitivity analysis of river flooding

A surrogate model is developed to accurately approximate a two-dimensional hydrodynamics numerical solver in order to conduct a reduced-cost variance-based global sensitivity analysis of the hydraulic state. The impact of uncertainties in river bottom friction and boundary conditions on the simulated water depth is analyzed for quasi-unsteady flows. An autoencoder technique adapted to non-linear variable dimension reduction is used to reduce the multi-dimensional model output so that the formulation of the surrogate remains computationally parsimonious. In addition, following the divide-and-conquer principle, a mixture of local polynomial chaos expansions is proposed to deal with non-linearity in the hydraulic state with respect to uncertain inputs. Machine learning techniques are used to automatically partition the input space into clusters that are not affected by non-linearities and support accurate surrogates. This combined strategy is applied to a reach of the Garonne River where river and floodplains dynamics are simulated by the numerical solver Telemac-2D. The merits of this strategy are highlighted when the flood front reaches regions where the topography features a strong gradient and where, consequently, strong non-linearities occur between the water depth and friction as well as hydrologic input forcing. By applying this strategy, the Q_2 metric improves by 90% compared to a classical polynomial chaos expansion surrogate, resulting in a much more reliable sensitivity analysis. This is particularly important in floodplain areas where human and economic activities are at stake.

Land use change study and the increased risk of floods disaster in Jeneberang watershed at Gowa Regency, South Sulawesi, Indonesia

As part of the Jeneberang watershed area, Gowa Regency has an increasing trend of risk of flood disaster which are impact of climate change that has occurred globally. The high rate of population growth and the development of community economic activities are accompanied by the increasing need for space both for settlements and economic activities which results in changes in land cover land use (LULC). This study aims to conduct a study of changes in LULC that can increase the risk of flooding in Gowa regency with watershed area approaches. This study uses a descriptive analysis method with spatial analysis techniques and complemented by other data from agencies, community interviews, and location surveys. LULC data were used in this study are the conversion results from aerial photographs of the Landsat 7 ETM + in 1999 and Landsat-8 OLI / TIRS in 2020 with a map scale of 1: 50,000. The result shows that during the period of study (1999-2020), there were significant changes in LULC in the Jeneberang watershed, where the Jeneberang watershed experienced deforestation of 36.67 Ha, forest degradation of 770.14 Ha and increasing of settlement areas of 3,49747 Ha. The interviews and surveys indicated that the flood disaster-prone areas have grown with residential areas which reduced the water catchment areas and narrowed river boundaries thus increase the potential of flood disaster risk in the future.

VOLUNTEERED GEOGRAPHIC INFORMATION (VGI) APPLICATION FOR MONITORING LAND USE VIOLATION CASE STUDY: CIGANJUR FLOOD

Land in DKI Jakarta has problems in land use. Many land-use does not comply with planning. Illegal buildings are often found in areas designated for green open space and river boundaries. Land use monitoring requires the role of information technology. This research uses an open-source-based application to develop easier and cheaper. The application consists of a smartphone-based application for the process of reporting land-use violations with the concept of Volunteered Geographic Information (VGI). The application can directly analyze verified data with spatial planning. The analysis uses overlay analysis to see the location and extent of violations in land use. The results of the analysis can be used as a basis for local governments to impose punishment on illegal buildings and to plan for future cities.

Formation of the asymmetric pattern of a river lithological catchment basin in relation to specific features of the tectonic structure of the territory

A digital terrain model of the Izh River lithological catchment basin located within the Russian Plain was developed on the basis of the ESRI ArcGIS 10.4 technologies using the SRTM 30 data. The Hydrology tool of the Spatial Analyzer set was applied to vectorize the river network and boundaries of the individual catchments forming the Izh River basin. The basin area was evaluated by a complex of morphometric indicators, such as geometrical indices (the area, the basin length, and width, the length of erosion network, the roundness coefficient) and geomorphologic indices (mean absolute elevation of the basin and the altitudinal difference, the basin slope, gradient and density of the river network, the energy of relief). The analysis of morphometric indices proved that the right bank is structurally most pronounced in relief and differs from the relatively flattened left bank in a number of indicators, namely absolute elevation difference, surface slope, gradient of the river network, and ruggedness of relief. The highest asymmetry coefficient suggests the asymmetric configuration of the basin which is due to the left-hand shift of the catchment towards the right bank. The spatial analysis of geological-tectonic organization of the basin revealed heterogenic tectonic structures and showed the correlation of relief structure of the Izh River with the spatial pattern of tectonic structures. It is argued that the basin asymmetry is, on the one hand, due to the difference in tectonic structures of its right and left bank areas, and, on the other hand, owing to the intrusion of several right-bank tributaries of the Kama River, which is the main watercourse of the 1st order, into the left-bank part of the Izh River basin. Thus, it is shown that the asymmetry of the basin could be explained by the presence of tectonic contacts, which separate geological structures different in lithological composition, genesis and age, in which the rivers have channeled their ways.

Suitability of space utilization of settlement in coastal areas of abeli and nambo sub-district, Kendari City using spatial and non-spatial methods

Land use for settlements needs to be regulated properly so that it is suitable with the city spatial plan by considering ecological balance aspect so that there is no deterioration in the land quality. Environmental damage can also occur because of the pattern of settlement development that exceeds the carrying capacity of the environment such as density, size and shape of settlements. Abeli and Nambo Sub-Districts, cover an area of 43.85 Km2 or 16.40% of the total area of Kendari city. it is a strategic area for urban development because it has a relatively wide location and it is directly facing the Banda Sea. This study aimed to: (1) analyze the level of suitability of land for settlements in the coastal areas of Abeli and Nambo Sub-Sub-Districts; (2) figure out of community perspective in the selecting the location of settlements in Abeli and Nambo Sub-Districts. The study used qualitative and quantitative research methods with descriptive qualitative analysis and spatial analysis. This study consisted of 8 variables namely slope, distance from the coast boundary, distance from river boundary, distance from tsunami prone location, distance from flood location, distance from mangrove ecosystem, sea tide fluctuations, and high ROB flood inundation. The results showed that (1) suitability land in the settlement in Abeli and Nambo Sub-Districts that were included in the very suitable criteria were 2,382.87 Ha or 80.44 %, suitable criteriawere 15.56 Ha or 15.56 %, the criteria for Less Suitable was 114.26 or 3.86 %, and Not Suitable criteria was 4.24 hectares or 0.14 %; (2) Respondents’ reasons for selecting a settlement location were influenced by consideration of house price (11 %) location or access to workplaces and public facilities (34 %), security against natural disasters (19 %), environmental health (21 %), convenience (11 %,) and others (3 %) while the reasons for respondents choosing the location of settlements based on residential Land Suitability were Very Suitable (40 %), Suitable (37 %), Less Suitable (21 %) and Not Suitable (1 %).

Forecasting System for Predicting the Dynamics of Oil Spill in a Tide-Dominated Estuary

ABSTRACT Crude oil is predicted to become one of the most detrimental sources of anthropogenic pollution to estuaries. A comprehensive survey of oil spill literature reveals that oil spill transport in estuaries presents a gap in academic knowledge and literature. To address this gap, we present the first detailed analysis of estuarine oil spill dynamics. We develop and analyse a range of simulations for the Humber Estuary, using TELEMAC3D; a coupled hydrodynamic and oil spill models. The river boundary of the Humber Estuary is forced by discharge data, while the offshore boundary is driven by tidal height data, including estuarine water temperature and salinity. The calibrated model shows good agreement with measured data during the validation process. Results show that: (a) the time of oil release within a tidal cycle significantly influences oil slick transport; and (b) the tidal range significantly influences oil slick impacted area and overall distance travelled, as oil slick released under spring tide is approximately double the oil slick size under neap tides and travels on average 71% farther. This study emphasises the need to: a) understand how the interaction of river discharge and tidal range influences oil slick transport; and (b) be aware of the time of release within a tidal cycle, to efficiently deal with oil spills. Findings should be useful for future operational oil spill response and could be equally applicable to other tide-dominated estuaries.

Impact of Pleistocene Eustatic Fluctuations on Evolutionary Dynamics in Southeast Asian Biodiversity Hotspots.

Pleistocene climatic fluctuations (PCF) are frequently highlighted as important evolutionary engines that triggered cycles of biome expansion and contraction. Although there is ample evidence of the impact of PCF on biodiversity of continental biomes, the consequences in insular systems depend on the geology of the islands and the ecology of the taxa inhabiting them. The idiosyncratic aspects of insular systems are exemplified by the islands of the Sunda Shelf in Southeast Asia (Sundaland), where PCF-induced eustatic fluctuations had complex interactions with the geology of the region, resulting in high species diversity and endemism. Emergent land in Southeast Asia varied drastically with sea-level fluctuations during the Pleistocene. Climate-induced fluctuations in sea level caused temporary connections between insular and continental biodiversity hotspots in Southeast Asia. These exposed lands likely had freshwater drainage systems that extended between modern islands: the Paleoriver Hypothesis. Built upon the assumption that aquatic organisms are among the most suitable models to trace ancient river boundaries and fluctuations of landmass coverage, the present study aims to examine the evolutionary consequences of PCF on the dispersal of freshwater biodiversity in Southeast Asia. Time-calibrated phylogenies of DNA-delimited species were inferred for six species-rich freshwater fish genera in Southeast Asia (Clarias, Channa, Glyptothorax, Hemirhamphodon, Dermogenys, Nomorhamphus). The results highlight rampant cryptic diversity and the temporal localization of most speciation events during the Pleistocene, with 88% of speciation events occurring during this period. Diversification analyses indicate that sea-level-dependent diversification models poorly account for species proliferation patterns for all clades excepting Channa. Ancestral area estimations point to Borneo as the most likely origin for most lineages, with two waves of dispersal to Sumatra and Java during the last 5 myr. Speciation events are more frequently associated with boundaries of the paleoriver watersheds, with 60%, than islands boundaries, with 40%. In total, one-third of speciation events are inferred to have occurred within paleorivers on a single island, suggesting that habitat heterogeneity and factors other than allopatry between islands substantially affected diversification of Sundaland fishes. Our results suggest that species proliferation in Sundaland is not wholly reliant on Pleistocene sea-level fluctuations isolating populations on different islands. [Dispersal; diversification; eustatic fluctuations; freshwater fishes; insular systems; Milankovitch cycles; paleoenvironments; vicariance.].

Electrical Conductivity as a General Predictor of Multiple Parameters in Tigris River Based on Statistical Regression Model

Surface water samples from different locations within Tigris River's boundaries in Baghdad city have been analyzed for drinking purposes. Correlation coefficients among different parameters were determined. An attempt has been made to develop linear regression equations to predict the concentration of water quality constituents having significant correlation coefficients with electrical conductivity (EC). This study aims to find five regression models produced and validated using electrical conductivity as a predictor to predict total hardness (TH), calcium (Ca), chloride (Cl), sulfate (SO4), and total dissolved solids (TDS). The five models showed good/excellent prediction ability of the parameters mentioned above, which is a very good startup to establish a rule of thumb in the laboratories to compare between observations. The importance of linear regression equations in predicting surface water quality parameters is a method that can be applied to any other location.

Demarcation of River based on UAV LIDAR Point Cloud Data

Delimiting the scope and boundary of river and lake management is the primary work of strengthening river and lake management, and is the precondition of water conservancy administration according to law. The precise scope of management and protection areas is defined for the purpose of regulating all activities within the area and carrying out water conservation activities within the area. The conventional surveying and mapping technology of acquiring terrain data, i.e., Computer Aided Design (CAD) drawing of river construction projects, mapping of 1:2 000 scale image, are not only time-consuming but also inaccurate.The high-resolution 3D point cloud data obtained from Unmanned Aerial Vehicle (UAV) lidar can identify the baseline lines of river management demarcation, i.e.,ank toe line, dike toe line, bank revetment top line, bank slope line, etc. Through spatial analysis and manual visual interpretation, the boundary of river management area can be accurately demarcated.The accuracy of the baseline lines of river management demarcation drawn by ARCGIS depends on the resolution of 3D point cloud data, the environment of the river and the deviation of manual visual interpretation.

Application of well-seismic reservoir prediction technology in oilfield

This study mainly takes the thick oil layer in Lamadian Oilfield as an example. This oil layer is mainly developed in the area dominated by fluvial sediments, and the reservoir sand body space changes frequently. If we only rely on the traditional single well logging data, it is difficult to directly and effectively predict the changes of the whole sedimentary sand body, and the spatial configuration relationship between river boundary and other sedimentary microfacies can not be effectively predicted. In order to effectively improve the understanding of cross-well sand bodies, it is necessary to effectively combine well seismic with reservoir prediction technology, give full play to the advantage of high resolution of well seismic in the longitudinal direction, and predict its specific adaptability and application according to different situations, so as to better improve the prediction accuracy of reservoir sand bodies and provide important information data for the rational adjustment of cross-well encryption and the formulation of effective measures to tap potential. Based on this, this article deeply analyzes the application value of well-seismic combined reservoir prediction technology in oil fields.