Land evaluation and site assessment: mapping for planning purposes

Author(s):  
W. R. Dearman

AbstractMaps and plans represent essential tools of the trade for planners and applied earth scientists alike, and thematic maps produced by geologists should be able to be understood by planners. Geology, geotechnics, geomorphology, hydrogeology and related sciences can provide essential data on some of the constraints to development and resources for development. Recognition of these permits safer, more cost- effective planning and development, and allows rational decisions to be taken as far as the exploitation of resources is concerned. Consequently the Department of Environment had been commissioning research to investigate the best means of collecting, collating, interpreting and presenting, in sets of maps and reports, geological results of direct applicability to land-use planning. For example, some years ago initial studies in thematic mapping were undertaken by the British Geological Survey and more recently a number of private consultants have carried out such work. Unfortunately, the results of some of these surveys have not, as yet, been published.

Author(s):  
Leah Greden Mathews ◽  
Art Rex ◽  
Anne Lancaster

Community land use decisions benefit from spatially explicit community preferences; yet, the methods for incorporating the preferences for intangible values are challenging to represent spatially. The purpose of this chapter is to provide an introduction to the Total Value Assessment Tool for Farmland (TVAL-Farm), a tool that incorporates scenic quality and cultural heritage elements to create an enhanced Land Evaluation and Site Assessment (LESA) model. The chapter describes the development of TVAL-Farm and its implications for farmland preservation in Western North Carolina. The enhancement of the LESA model created by TVAL-Farm provides insight and a framework on how to collect and incorporate qualitative public values within the quantitative environment of a Geographic Information Systems (GIS). Inclusion of these public values is essential for holistically valuing land parcels and understanding community land use preferences. Increased use of modern technologies in the data collection process will promote a cost-effective method of community participation and engagement.


Author(s):  
P. G. Fookes

AbstractMost natural hazards can be dealt with be measures involving avoidance or prevention, the causes of such hazards being relatively well understood so that identification and prediction (admittedly not in absolute terms) can be made. Nonetheless in many parts of the world, the response to natural hazards by means of risk evaluation and consequent land use planning is lacking. Many methods are available to evaluate the risk which potential hazards present. The results can be used to produce hazard-risk maps. It could be another generation or two before there is enough user generated feedback to help establish a model for mapmakers to follow.


2021 ◽  
Vol 13 (12) ◽  
pp. 6976
Author(s):  
Dimitrios E. Alexakis ◽  
George D. Bathrellos ◽  
Hariklia D. Skilodimou ◽  
Dimitra E. Gamvroula

Karst features such as polje are highly vulnerable to natural and anthropogenic pollution. The main objectives of this study were to investigate the soil quality in the Ioannina polje (north-west Greece) concerning arsenic (As) and zinc (Zn), and delineate their origin as well as compare the As and Zn content in soil with criteria recorded in the literature. For this purpose, the geomorphological settings, the land use, and the soil physicochemical properties were mapped and evaluated, including soil texture and concentrations of aqua-regia extractable As and Zn. The concentration of elements was spatially correlated with the land use and the geology of the study area, while screening values were applied to assess land suitability. The results reveal that 72% of the total study area has a very gentle slope. This relief favors urban and agricultural activity. Thus, the urban and agricultural land used cover 92% of the total area. The spatial distribution for As and Zn in the soil of the study area is located on very gentle slopes and is strongly correlated with the geological parent materials and human-induced contamination sources. Arsenic and Zn can be considered enriched in the soil of the area studied. The median topsoil contents (in mg kg−1) for As (agricultural soil 16.0; urban soil 17.8) and Zn (agricultural soil 92.0; urban soil 95.0) are higher compared to the corresponding median values of European topsoils. Land evaluation suitability concerning criteria given from the literature is discussed. The proposed work may be helpful in the project of land use planning and the protection of the natural environment.


Author(s):  
A. A. Wilson

AbstractThe Aldridge-Brownhills area, 14 km north of Birmingham, though largely urban, still contains large reserves of sand and gravel, brick clay and coal in areas of open country. The present work, carried out by the British Geological Survey, is a verification of the planning as it affects future land use. Pillar and stall workings in Wenlock Limestone are a hazard around Daw End. The effects of subsidence induced by coal mining are greatest on the Vigo and Clayhanger faults, which locally define the limit of working. The largely dry, abandoned coal mines at Aldridge and Walsall Wood and the old marl quarries overlying them are a major, controlled, chemical waste disposal facility, sealed in by the Etruria Formation. Boreholes into Triassic sandstones are used for public water supply and any future infill in nearby gravel pits is also a matter for close control.


Author(s):  
A. Forster ◽  
P. R. N. Hobbs ◽  
R. J. Wyatt ◽  
D. C. Entwisle

AbstractIn March 1984 the British Geological Survey commenced an environmental geological study of parts of west Wiltshire and south east Avon for the Department of the Environment. The objective of this study was to collect the available geological data relevant to the area, and to present them as a series of thematic maps accompanied by a descriptive report and a database/archive of the data used.The output is intended to be used by land-use planners. It is designed simultaneously to be understandable by people not trained in geology and yet to contain detailed information required by specialists concerned with the environment and its development. The 14 maps which were produced describe themes which include solid lithostratigraphy, drift deposits, the inferred distribution of Great Oolite Freestone, the inferred distribution of fuller’s earth, groundwater, ground conditions in relation to groundwater, geotechnical properties of bedrock and superficial deposits, landslipped and cambered strata, distribution of slope angle, and mining.Although the task was primarily a desk study, it was found necessary to carry out a small amount of field survey to re-interpret the foundered strata to the north-west of Bath. This re-survey has been presented in a style consistent with the mapping of the rest of the study area. A fifteenth map showing the result of the re-interpretation of the foundered strata was produced as a supplement to the main report.This paper describes the methods and the results of this study and comments on the implications of the technique for land-use planning.


Author(s):  
Jaya N. Surya ◽  
G.S. Sidhu ◽  
T. Lal ◽  
D. Singh ◽  
R.P. Yadav ◽  
...  

Author(s):  
Andy Bhermana ◽  
Susilawati Susilawati

The main problem faced by sloping lands in the humid tropic includes land degradation influencing natural ecosystem damage broadly. Land conversion and improper land-use have been widely recognized as the main cause of environmental damage since the demands for agricultural lands become greater than land resource available. The objective of this study was to determine the concept of appropriate land-use planning through environmentally sound spatial management in order to prevent land and environmental degradation.  The sub-district of Antang Kalang was chosen as study area representing sloping lands in humid tropic that have a susceptibility to erosion. Conservation approach by the use of USLE erosion risk prediction model and land evaluation through land suitability classification was used in this study. The geographic information system (GIS) and remote sensing (RS) technology were applied to generate spatial basic information and to assist in spatial analysis. Two crops, upland rice, and rubber,  representing food crop and estate p have been selected based on the local resource that has been existed since a long time ago. The result of spatial analysis shown that the arable land for agricultural practices covers  9,039 hectares (23.19%) while for non-arable land, it is allocated for forest preservation with total areas 29,934 hectares (76.81%). Land-use planning and land resources management involving conservation aspect and land suitability evaluation should be taken into account for farming practice at sloping lands areas since the value of soil loss potential appears as an indicator of erosion risk. Permanent cultivation system and the intercropping farming system is the option of recommended agricultural practice at sloping lands in the humid tropic that have a susceptibility to erosion.


Author(s):  
Nguyen Huu Cuong

In this research, the integrated model of GIS and decision tree (DT) was built for land suitability analysis that support the foundation of land use planning. GIS was used to create thematic maps and decision tree shows several factor combinations according to plant average productivity. This study is applied for coconut trees in Mo Cay Nam district, Ben Tre province. The target variable is the productivity and the predictor variables consist of soil types, salinity, acidity, flood and irrigation. The study shows that the interpretation level of the predictive variables is 99.09%. The area of highly suitable is 3,522.22 hectares, suitable is 12,376.21 hectares, moderately suitable is 6,309.37 hectares.


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