Ancient Settlement, Urban Gardening, and Environment in the Gulf Lowlands of Mexico

2007 ◽  
Vol 18 (4) ◽  
pp. 385-406 ◽  
Author(s):  
Barbara L. Stark ◽  
Alanna Ossa

Urban settlement in the western lower Papaloapan River basin in the Gulf lowlands was dispersed and likely employed intensive gardening near domiciles. Land surrounding homes also may have played a symbolic role in these agrarian societies. Water works—formal ponds associated with temple platforms and other prominent structures as well as with many residential mounds—support the idea of symbolic as well as practical functions in land use around buildings. Dispersed occupation occurs in low elevations suited to recessional planting, a technique that takes advantage of dry season ground moisture in low areas where rain and flood waters recede as the water table drops. We analyze elevational zones to show greater settlement density in the low-lying Blanco River delta than in higher elevations upriver. Analysis of distances between archaeological residences and wetlands and drainages shows that residences generally were close to seasonally flooded areas. We also highlight anthropogenic qualities in the alluvial landscape, offering a land use perspective distinct from other views of agricultural intensification. The settlement pattern is compatible with Mesoamerican forms of urbanism.

2020 ◽  
Vol 12 (9) ◽  
pp. 3510 ◽  
Author(s):  
Dechao Chen ◽  
Acef Elhadj ◽  
Hualian Xu ◽  
Xinliang Xu ◽  
Zhi Qiao

Many catchments in northern Algeria, including the coastal Mitidja Basin in the north central part of the country have been negatively affected by the deterioration of water quality in recent years. This study aims to discover the relationship between land use change and its impact on water quality in the coastal Mitidja river basin. Based on the data of land use and water quality in 2000, 2010 and 2017, the relationship between land use change and surface water quality index in the Mitidja Watershed was discussed through GIS and statistical analysis. The results show that the physical and chemical properties of the Mitidja river basin have obvious spatial heterogeneity. The water quality of upstream was better than that of downstream. There was a significant spatial relationship between the eight water quality indicators and three land use types, including urban residential land, agricultural land and vegetation. In most cases, settlements and agricultural land are the dominant factors leading to river pollution, and higher vegetation coverage helps to improve water quality. The regression model revealed that percentage of urban settlement area was a predictor for NH4-N, BOD5, COD, SS, PO4-P, DO and pH, while vegetation was a predictor for NO3-N. The analysis also showed that during this period, urban settlement areas increased sharply, which has a significant impact on water quality variables. Agricultural land only had a significant positive correlation with PO4-P. The results provide an effective way to evaluate river water quality, control water pollution and land use management by landscape pattern.


2017 ◽  
Vol 5 (2) ◽  
pp. 58-61
Author(s):  
Muhammad Zharif Jasni ◽  
Noor Janatun Naim Jemali ◽  
Syafinie Abdul Majid

Kelantan is one of the east coast states of Malaysia, which has faced yearly flooding catastropheespecially during north-east-monsoon season. Most of the land use from upstream to downstreamof Kelantan River Basin was affected after December 2014 when the worst flood was recorded fordecades. Due to the immense flood, Mimosa pigra is spreading forming dense thickets belt alongthe riparian vegetation area. It has transformed the river water regime. M. pigra is identified as theworst invasive species in Malaysia and caused massive threat to riverine ecosystem. It’sconsidered to be a colonizer of mainly wetland and seasonally flooded areas. The dispersalprocess by which this rapid colonization was achieved has yet to be fully documented. The studywas done in three sampling areas along Kelantan river basin (upstream, downstream, outfall)focusing on the distribution of M. pigra after the recent flood. Based on Landsat TM imageclassification analysis and ground thruting, result showed 60% (upstream), 40% (downstream)and 70% (outfall) of accuracy assessment respectively. For each of the 30 sampled point (a 7.5mradius circle), M. pigra has covered an average of 23.04% of the area with a total of 2,309.58m2/ha.


2017 ◽  
Author(s):  
Mohammad Iqbal ◽  
◽  
Tara N. Bhattarai ◽  
Chad Heinzel ◽  
Sushil Tuladhar

Sign in / Sign up

Export Citation Format

Share Document