Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Accueil du site → Doctorat → Chine → 2012 → Research on Hydro-ecosystems Dynamic Monitoring and Comprehensive Evaluation of Large-scale Irrigation Districtin Semi-arid Region

Chang’an University (2012)

Research on Hydro-ecosystems Dynamic Monitoring and Comprehensive Evaluation of Large-scale Irrigation Districtin Semi-arid Region

乔长录; Qiao Chang Lu

Titre : Research on Hydro-ecosystems Dynamic Monitoring and Comprehensive Evaluation of Large-scale Irrigation Districtin Semi-arid Region

Auteur : 乔长录; Qiao Chang Lu

Grade : Doctoral Dissertation 2012

Université : Chang’an University

Résumé partiel
Irrigation District is the relatively dense regions of the human water-related activities,especially large-scale irrigation district of the channel and well irrigation in semi-arid regions.Circulation and transformation of surface water and groundwater of large-scale irrigationdistrict in semi-arid regions are deeply influenced by human water-related activities. Coupledwith the impact of human’s other economic activities, a series of hydro-ecological problemsappeared increasingly in large-scale irrigation in recent years. For example, in the early1980sand before, hydro-ecosystems of Jinghuiqu Irrigation District was in good condition. Sincethe1990s, with the rapid socio-economic development, water consumption dramaticallyincreased, combined with decreasing in regional precipitation, sharp drop in Jing River runoffand not perfection in water pricing system and management system, groundwater has beenexploited in large. As a result of over exploited groundwater, large-scale groundwater leveldeclined, the range of descent funnel continuously expanded, resulting in a series ofhydro-ecological problems such as sink, crack, deterioration of water quality, less foodproduction, soil pollution, soil salinization and soil fertility decline, etc.These not only hinder the sustainable development of society and economy oflarge-scale irrigation district in semi-arid regions, but also pose a serious threat to watersafety, food security and ecological safety.However, the current hydro-ecological monitoringmethods of irrigation district stillremain in the backwardness of the artificial hand-monitoring, also limited to the groundwaterlevel, channel water, precipitation, and a few other factors, even no monitoring. For example,Jinghuiqu Irrigation District began artificial groundwater observation in1952, butobservation wells almost scrapped at present, the observation has been suspended for manyyears. Therefore, facing the increasingly serious hydro-ecological problems of large-scaleirrigation district in semi-arid regions,it is very significant to carry out studies of dynamicmonitoring and comprehensive evaluation of hydro-ecosystems for data acquisition andcomprehensive analysis in the study of the hydro-ecological coupling, based on advanced technology such as computer, GIS and RS, etc.On the basis of comprehensive and systemic summarization of the existing researchresults, from the point of the structure, features and the relevant problems of thehydro-ecosystems of large-scale irrigation district in semi-arid regions, a deep research wascarried out on a dynamic monitoring method, monitoring index system and spatial databaseof hydro-ecosystems in the paper. A set of comprehensive monitoring method systems thatconsist of “automatic and dynamic monitoring networks, satellite-based remote sensingmonitoring, a socio-economic survey and field experiments” is proposed. A set of scientificand reasonable monitoring index systems is defined. And the spatial database based onGeodatabase model is built. For Jinghuiqu Irrigation District, automatic and dynamicmonitoring system of main hydro-ecological factors is designed and realized. Finally, on thebasis of hydro-ecosystems dynamic monitoring spatial database, research on comprehensiveevaluation on quality of the hydro-ecosystems is carried out, and case analysis of JinghuiquIrrigation District is done.

Mots clés : semi-arid regions; hydro-ecosystems; Jinghuiqu Irrigation District; dynamicmonitoring; comprehensive evaluation;

Présentation (CNKI)

Page publiée le 30 mars 2014, mise à jour le 11 janvier 2018